229 fault, warning and safety-shutdown messages documented by the manufacturer for the YORK YMC2, from 10 manuals. A message in bold has a page of its own: what it means, why it appears, what to check and how the unit restarts — from the manual that documents it. The others link to their row in the manual, with the page it was taken from.
Run messages
| Message on the display | What it means | Manual |
|---|---|---|
| WARNING - VSD DC BUS ACTIVE | Non-annunciating alert that the DC Bus is precharged or pre-regulated for a state outside of… | 160.78-O2 p.114 |
Start inhibit messages
| Message on the display | What it means | Manual |
|---|---|---|
| LINE FREQUENCY NOT SET | Chiller prevented from starting because the Line Frequency setpoint is invalid. | 160.78-O2 p.114 |
| LINE VOLTAGE NOT SET | Chiller prevented from starting because the Line Voltage setpoint is invalid. | 160.78-O2 p.114 |
| PRV NOT CALIBRATED | Start inhibited because the Pre-rotation vanes calibration has not been done. | 160.78-O2 p.114 |
| VGD NOT CALIBRATED | Start inhibited because the Variable Geometry Diffuser calibration has not been done. | 160.78-O2 p.114 |
| VGD STROKE NOT CALIBRATED | The VGD stroke calibration procedure has not yet been performed. | 160.84-OM1 p.94 |
| VGD FEEDBACK NOT CALIBRATED | The VGD feedback calibration has not yet been performed since last stroke calibration. | 160.84-OM1 p.94 |
| MBC - INITIALIZATION FAILURE | OptiView was unable to read a valid validation key code over serial communications from the MBC… | 160.84-OM1 p.94 |
Warning messages
| Message on the display | What it means | Manual |
|---|---|---|
| WARNING - MBC - LANDING COUNTER HIGH | MBC landing counter has reached its warning threshold of shaft landing events. | 160.78-O2 p.115 |
| WARNING - MBC - ROTATION MODE OFF | MBC reports Rotation Mode OFF while the microboard is commanding it ON. | 160.78-O2 p.115 |
| WARNING - MOTOR - HIGH CURRENT LIMIT | Motor current has reached the Motor Overload current limit; capacity control is overriding to… | 160.78-O2 p.115 |
| WARNING - CONDENSER - HIGH PRESSURE LIMIT | Condenser pressure exceeds the High Pressure Warning Setpoint; capacity override active. | 160.78-O2 p.115 |
| WARNING - CONDENSER OR EVAPORATOR XDCR ERROR | Evaporator pressure transducer reads higher than the condenser transducer - indicative of a… | 160.78-O2 p.115 |
| WARNING - CONDENSER OR VGD SENSOR FAILURE | Stall (discharge) pressure transducer and condenser pressure transducer outputs disagree; VGD held… | 160.78-O2 p.115 |
| WARNING - EVAPORATOR - LOW PRESSURE LIMIT | Evaporator pressure has fallen to the warning threshold; capacity control overriding to raise… | 160.78-O2 p.115 |
| WARNING - EXCESS SURGE DETECTED | Surge Window Count has exceeded the Count Limit (applies only if Surge Protection SHUTDOWN is… | 160.78-O2 p.116 |
| WARNING - MOTOR - HIGH HOUSING TEMPERATURE | Motor housing temperature at or above the warning level. | 160.78-O2 p.116 |
| WARNING - MOTOR - HIGH WINDING TEMPERATURE | An enabled motor winding temperature has exceeded the warning threshold. | 160.78-O2 p.116 |
| WARNING - REAL TIME CLOCK FAILURE | BRAM / real-time clock failed its power-up test. | 160.78-O2 p.116 |
| WARNING - SETPOINT OVERRIDE | Blank or failed BRAM detected at power-up; all setpoints reverted to defaults. | 160.78-O2 p.116 |
| WARNING - VSD - INPUT VOLTAGE IMBALANCE | Supply line-to-line voltage imbalance above 5%. | 160.78-O2 p.116 |
| WARNING - CONDENSER FREEZE THREAT FROM LOW PRESSURE | While the chiller state is Stopped, the Saturated Condenser Temperature decreased below 35.0°F… | 160.84-OM1 p.95 |
| WARNING - LIQUID LEVEL SETPOINT NOT ACHIEVED | The chiller is running and Refrigerant Level > (Refrigerant Level setpoint +15%) or Refrigerant… | 160.84-OM1 p.96 |
| WARNING - LOSS OF SUBCOOLER LIQUID SEAL | The chiller is running greater than 30 minutes and the Subcooler Effectiveness value decreased less… | 160.84-OM1 p.96 |
| WARNING - MBC - HIGH AXIAL OSCILLATOR VOLTAGE | Manual reset warning set when the internal oscillator that drives the axial position sensor coil is… | 160.84-OM1 p.96 |
| WARNING - MBC - HIGH RADIAL OSCILLATOR VOLTAGE | Manual reset warning set when the internal oscillator that drives the radial position sensor coil… | 160.84-OM1 p.96 |
| WARNING - MBC - CHECKSUM CENTERING | Appears when the MBC Axial Centering process was never performed, or not correctly realized… | 160.84-OM1 p.96 |
| WARNING - MBC - DSP WATCHDOG | A software reboot has occurred on the control board due to processor problem, but reset with the… | 160.84-OM1 p.96 |
| WARNING - MBC - AMP WATCHDOG | A software reboot has occurred on the amplifier (power) board due to processor problem, but reset… | 160.84-OM1 p.96 |
| WARNING - MBC - INTERNAL ALARM | The MBC experienced an unsatisfactory condition detected internally to the control system. | 160.84-OM1 p.96 |
| WARNING - MOTOR - HIGH ROTOR TEMPERATURE | Occurs when the estimated rotor temperature exceeds 230°F (110°C) for 3 continuous seconds. | 160.84-OM1 p.97 |
| WARNING - UPS - BATTERY NOT CONNECTED | Auto reset warning. The minimum and maximum Battery Voltage within each 10 second window is stored;… | 160.84-OM1 p.97 |
| WARNING - UPS - CHECK BATTERY CONNECTION | Manual reset warning set when Battery Voltage > 16.0 V (indicates only the UPS output is connected… | 160.84-OM1 p.98 |
| WARNING - UPS - LINE LOW BATTERY VOLTAGE | Auto reset warning set when all of the following are true: Control Voltage digital input is high… | 160.84-OM1 p.104 |
| WARNING - UPS - NOT CHARGING | Auto reset warning set when all of the following are true for 5 continuous seconds: Control Voltage… | 160.84-OM1 p.98 |
Cycling shutdown messages
| Message on the display | What it means | Manual |
|---|---|---|
| CHILLED LIQUID - FLOW SWITCH OPEN | Loss of chilled liquid flow signal while running or starting. | 160.78-O2 p.117 |
| CONDENSER - FLOW SWITCH OPEN | Loss of condenser liquid flow signal while running. | 160.78-O2 p.117 |
| CONTROL PANEL - LOSS OF CONTROL VOLTAGE | Control power input signal low. | 160.78-O2 p.117 |
| CONTROL PANEL - POWER FAILURE | Control power failure occurred (cycling version when displayed in orange). | 160.78-O2 p.117 |
| CONTROL PANEL - SCHEDULE | Chiller shut down by its programmed daily schedule. | 160.78-O2 p.117 |
| EVAPORATOR - LOW PRESSURE | Evaporator (suction) pressure fell to the cycling shutdown threshold. | 160.78-O2 p.118 |
| EXPANSION I/O - SERIAL COMMUNICATIONS | Communication between microboard and expansion I/O board lost. | 160.78-O2 p.118 |
| LEAVING CHILLED LIQUID - LOW TEMPERATURE | Leaving chilled liquid fell to the programmed shutdown temperature. | 160.78-O2 p.118 |
| MBC - HIGH AMPLIFIER TEMPERATURE | MBC amplifier board overtemperature (cycling level). | 160.78-O2 p.118 |
| MBC - HIGH DC/DC TEMPERATURE | MBC DC/DC converter board overtemperature (cycling level). | 160.78-O2 p.118 |
| MBC - SERIAL COMMUNICATIONS | Invalid or missing responses from the MBC over Modbus. | 160.78-O2 p.118 |
| MBC SHUTDOWN - REQUESTING FAULT DATA | MBC shut the chiller down; cause not yet received over the serial link. | 160.78-O2 p.118 |
| MBC - SPEED SIGNAL FAULT | MBC lost the speed signal from the VSD during Rotation Mode. | 160.78-O2 p.119 |
| MBC - STARTUP FAILURE | Chiller failed to exit the MBC startup state within 60 seconds. | 160.78-O2 p.119 |
| MBC - STOP (FAULT) CONTACTS OPEN | MBC ESD fault cause not received within 10 seconds. | 160.78-O2 p.119 |
| MBC - V13 LOW FREQUENCY DISPLACEMENT | Excessive low-frequency shaft displacement at the impeller-end radial bearing, V axis. | 160.78-O2 p.119 |
| MBC - V13 POSITION | Shaft displacement out of position at the impeller-end radial bearing, V axis. | 160.78-O2 p.119 |
| MBC - V24 LOW FREQUENCY DISPLACEMENT | Excessive low-frequency shaft displacement at the opposite-impeller-end radial bearing, V axis. | 160.78-O2 p.119 |
| MBC - V24 POSITION | Shaft displacement out of position at the opposite-impeller-end radial bearing, V axis. | 160.78-O2 p.119 |
| MBC - W13 LOW FREQUENCY DISPLACEMENT | Excessive low-frequency shaft displacement at the impeller-end radial bearing, W axis. | 160.78-O2 p.119 |
| MBC - W13 POSITION | Shaft displacement out of position at the impeller-end radial bearing, W axis. | 160.78-O2 p.120 |
| MBC - W24 LOW FREQUENCY DISPLACEMENT | Excessive low-frequency shaft displacement at the opposite-impeller-end radial bearing, W axis. | 160.78-O2 p.120 |
| MBC - W24 POSITION | Shaft displacement out of position at the opposite-impeller-end radial bearing, W axis. | 160.78-O2 p.120 |
| MBC - VW13 VIBRATION | Synchronous shaft vibration above limit at the impeller-end radial bearing. | 160.78-O2 p.120 |
| MBC - VW24 VIBRATION | Synchronous shaft vibration above limit at the opposite-impeller-end radial bearing. | 160.78-O2 p.120 |
| MBC - Z12 LOW FREQUENCY DISPLACEMENT | Excessive axial shaft displacement over a 7-second window. | 160.78-O2 p.120 |
| MBC - Z12 POSITION | Axial shaft displacement out of position. | 160.78-O2 p.120 |
| MULTIUNIT CYCLING - CONTACTS OPEN | External multi-unit cycling contacts opened. | 160.78-O2 p.120 |
| SYSTEM CYCLING - CONTACTS OPEN | External system cycling contacts opened. | 160.78-O2 p.121 |
| VSD - DC BUS PRE-REGULATION | DC link failed to reach the regulated setpoint after boost control was enabled. | 160.78-O2 p.121 |
| VSD - HIGH DC BUS VOLTAGE | DC link over-voltage. | 160.78-O2 p.121 |
| VSD - HIGH INTERNAL AMBIENT TEMPERATURE | VSD enclosure ambient overtemperature. | 160.78-O2 p.121 |
| VSD - HIGH PHASE A INPUT CURRENT | Input phase A instantaneous overcurrent. | 160.78-O2 p.121 |
| VSD - HIGH PHASE B INPUT CURRENT | Input phase B instantaneous overcurrent. | 160.78-O2 p.121 |
| VSD - HIGH PHASE C INPUT CURRENT | Input phase C instantaneous overcurrent. | 160.78-O2 p.121 |
| VSD - HIGH PHASE A MOTOR CURRENT | Motor phase A instantaneous overcurrent. | 160.78-O2 p.121 |
| VSD - HIGH PHASE B MOTOR CURRENT | Motor phase B instantaneous overcurrent. | 160.78-O2 p.122 |
| VSD - HIGH PHASE C MOTOR CURRENT | Motor phase C instantaneous overcurrent. | 160.78-O2 p.122 |
| VSD INITIALIZATION FAILED | VSD boards failed power-up initialization. | 160.78-O2 p.122 |
| VSD - LOGIC BOARD POWER SUPPLY | VSD logic board low-voltage supplies out of limits. | 160.78-O2 p.122 |
| VSD - LOGIC BOARD PROCESSOR | Communication failure between the two VSD logic board microprocessors. | 160.78-O2 p.122 |
| VSD - LOW DC BUS VOLTAGE | DC link under-voltage after successful pre-charge. | 160.78-O2 p.122 |
| VSD - LOW PHASE A INPUT BASEPLATE TEMPERATURE | Input rectifier phase A IGBT module too cold. | 160.78-O2 p.122 |
| VSD - LOW PHASE B INPUT BASEPLATE TEMPERATURE | Input rectifier phase B IGBT module too cold. | 160.78-O2 p.122 |
| VSD - LOW PHASE C INPUT BASEPLATE TEMPERATURE | Input rectifier phase C IGBT module too cold. | 160.78-O2 p.122 |
| VSD - LOW PHASE A MOTOR BASEPLATE TEMPERATURE | Inverter phase A IGBT module too cold. | 160.78-O2 p.122 |
| VSD - LOW PHASE B MOTOR BASEPLATE TEMPERATURE | Inverter phase B IGBT module too cold. | 160.78-O2 p.122 |
| VSD - LOW PHASE C MOTOR BASEPLATE TEMPERATURE | Inverter phase C IGBT module too cold. | 160.78-O2 p.122 |
| VSD - NOT RUNNING | VSD not reporting run state while a run command is issued. | 160.78-O2 p.122 |
| VSD - PHASE A INPUT DCCT OFFSET | Input DCCT offset out of range at pre-charge initiation. | 160.78-O2 p.123 |
| VSD - PHASE B INPUT DCCT OFFSET | Input DCCT offset out of range at pre-charge initiation. | 160.78-O2 p.123 |
| VSD - PHASE C INPUT DCCT OFFSET | Input DCCT offset out of range at pre-charge initiation. | 160.78-O2 p.123 |
| VSD - PHASE A INPUT GATE DRIVER | Boost rectifier phase A gate driver fault. | 160.78-O2 p.123 |
| VSD - PHASE B INPUT GATE DRIVER | Boost rectifier phase B gate driver fault. | 160.78-O2 p.123 |
| VSD - PHASE C INPUT GATE DRIVER | Boost rectifier phase C gate driver fault. | 160.78-O2 p.123 |
| VSD - PHASE A MOTOR GATE DRIVER | Inverter phase A gate driver fault. | 160.78-O2 p.123 |
| VSD - PHASE B MOTOR GATE DRIVER | Inverter phase B gate driver fault. | 160.78-O2 p.123 |
| VSD - PHASE C MOTOR GATE DRIVER | Inverter phase C gate driver fault. | 160.78-O2 p.123 |
| VSD - PRECHARGE - LOW DC BUS VOLTAGE 1 | DC bus did not reach the low pre-charge threshold in time. | 160.78-O2 p.123 |
| VSD - PRECHARGE - LOW DC BUS VOLTAGE 2 | DC bus did not reach the high pre-charge threshold in time. | 160.78-O2 p.123 |
| VSD - RUN SIGNAL | Redundant run commands not both received within 5 seconds. | 160.78-O2 p.124 |
| VSD - SERIAL COMMUNICATIONS | No response from the VSD logic board over three consecutive attempts. | 160.78-O2 p.124 |
| VSD - SERIAL RECEIVE | VSD not receiving valid communication from the control panel. | 160.78-O2 p.124 |
| VSD SHUTDOWN - REQUESTING FAULT DATA | VSD shut the chiller down; cause not yet received over the serial link. | 160.78-O2 p.124 |
| VSD - SINGLE PHASE INPUT POWER | One line-to-line input voltage fell below 200 Vrms. | 160.78-O2 p.124 |
| VSD - STOP (FAULT) CONTACTS OPEN | VSD fault cause not received within 20 seconds. | 160.78-O2 p.124 |
| CONDENSER -FREEZE THREAT-FLOW SWITCH OPEN | Set when all of the following are true: Chiller State is Stopped; Saturated Condenser Temperature <… | 160.84-OM1 p.99 |
| ISOLATION VALVES - NOT CLOSED | The optional brine freeze protection motorized isolation valves Close output is energized > 40… | 160.84-OM1 p.100 |
| MBC - FAULT CONTACTS OPEN | See MBC Shutdown - Requesting Fault Data. If the control center's microboard does not receive the… | 160.84-OM1 p.100 |
| MBC - LOW INPUT VOLTAGE | Main DC supply voltage to the MBC decreased below 135 VDC (150%-10%). | 160.84-OM1 p.100 |
| MBC - UNKNOWN PARAMETER FILE | Set when the bearing setup parameter file received from Opti-View is not an expected file format.… | 160.84-OM1 p.101 |
| MBC - Z12 VIBRATION | The MBC has measured a vibration in axial position at 1 times the rotating frequency whose… | 160.84-OM1 p.103 |
| UPS - LINE LOW BATTERY VOLTAGE | This cycling fault initiates a soft shutdown if set while the chiller state is Running. Set during… | 160.84-OM1 p.104 |
| VSD - DC BUS PRE- REGULATION | The DC Bus voltage has not increased to a value of +/- 50 volts of the DC Bus voltage setpoint of… | 160.84-OM1 p.104 |
| VSD - INVALID SETPOINTS | The VSD Logic Board is able to determine which model of drive can run which model of motor. If the… | 160.84-OM1 p.106 |
Safety shutdown messages
| Message on the display | What it means | Manual |
|---|---|---|
| AUXILIARY SAFETY - CONTACTS CLOSED | User-defined auxiliary safety input tripped. | 160.78-O2 p.125 |
| CONDENSER - HIGH PRESSURE CONTACTS OPEN | Electromechanical high pressure safety switch tripped. | 160.78-O2 p.125 |
| CONDENSER - PRESSURE TRANSDUCER OUT OF RANGE | Condenser pressure transducer signal outside its valid range. | 160.78-O2 p.125 |
| DISCHARGE - LOW TEMPERATURE | Discharge temperature below 30°F. | 160.78-O2 p.125 |
| EVAPORATOR - LOW PRESSURE - SMART FREEZE | Smart Freeze protection timed out with the evaporator below the freeze threshold. | 160.78-O2 p.126 |
| EVAPORATOR - TRANSDUCER OR LEAVING LIQUID PROBE | Evaporator pressure and leaving chilled liquid readings inconsistent - probable transducer or… | 160.78-O2 p.126 |
| EVAPORATOR - TRANSDUCER OR TEMPERATURE SENSOR | Evaporator pressure and refrigerant temperature readings inconsistent - probable sensor defect. | 160.78-O2 p.127 |
| MBC - CABLE FAULT | Supervisory jumper continuity lost in a main cable assembly. | 160.78-O2 p.127 |
| MBC - CUSTOMER SERIAL LINK DISABLED | MBC serial setting changed away from panel control. | 160.78-O2 p.127 |
| MBC - DATA ACQUISITION FAULT | Internal communication problem on the AMB control board. | 160.78-O2 p.127 |
| MBC - DSP COMMUNICATION | Communication error across circuit boards in the MBC. | 160.78-O2 p.127 |
| MBC - DSP INITIALIZATION | MBC control board software failed to initialize. | 160.78-O2 p.127 |
| MBC - DSP INTEGRITY | Internal problem on the AMB control board. | 160.78-O2 p.128 |
| MBC - DSP WATCHDOG | Lapse in MBC microprocessor activity detected by the watchdog. | 160.78-O2 p.128 |
| MBC - EEPROM | Data discrepancy with the EPROM on the AMB control board. | 160.78-O2 p.128 |
| MBC - EXCESSIVE SHUTDOWNS | Three MBC cycling shutdowns within 15 minutes. | 160.78-O2 p.128 |
| MBC - FLASH MEMORY CLEAR | Internal problem with the memory chip on the AMB control board. | 160.78-O2 p.128 |
| MBC - FLASH MEMORY WRITE | Internal problem with the memory chip on the AMB control board. | 160.78-O2 p.128 |
| MBC - HIGH BEARING CURRENT | Magnetic bearing excitation current above the power amplifier rating. | 160.78-O2 p.128 |
| MBC - HIGH BEARING Z1 TEMPERATURE | Impeller-end axial bearing overtemperature. | 160.78-O2 p.129 |
| MBC - HIGH BEARING Z2 TEMPERATURE | Opposite-impeller-end axial bearing overtemperature. | 160.78-O2 p.129 |
| MBC - NO LEVITATION | Levitation commanded but the Rotation Allowed input is not high. | 160.78-O2 p.129 |
| MBC - OSCILLATOR FAULT | Position sensor oscillator overloaded. | 160.78-O2 p.129 |
| MBC - OVERSPEED FAULT | Rotor speed above the 458 Hz setpoint. | 160.78-O2 p.129 |
| MBC - POWER SUPPLY FAULT | Power supply board overload or abnormal DC/DC converter voltage. | 160.78-O2 p.129 |
| MBC - ROTOR ELONGATION | Axial displacement difference above the interpolated limit. | 160.78-O2 p.130 |
| SAFETY STOP | Panel safety stop pushbutton depressed. | 160.78-O2 p.130 |
| MBC - UNAUTHORIZED ROTATION | Rotor speed signal present while Levitation Mode is not activated. | 160.78-O2 p.130 |
| MOTOR - HIGH WINDING TEMPERATURE | Motor winding temperature above the shutdown threshold. | 160.78-O2 p.130 |
| MOTOR - HIGH HOUSING TEMPERATURE | Motor housing temperature at or above 185°F. | 160.78-O2 p.130 |
| SALES ORDER - INVALID COMPRESSOR MODEL | Compressor Model field does not conform to the required format. | 160.78-O2 p.131 |
| SURGE PROTECTION - EXCESS SURGE | Surge count exceeded the limit with shutdown enabled. | 160.78-O2 p.131 |
| WATCHDOG - SOFTWARE REBOOT | Microboard software watchdog reset the processor. | 160.78-O2 p.131 |
| VSD - DC BUS LOCKOUT - DO NOT CYCLE POWER | DC bus voltage present while the unit is stopped with no energize command. | 160.78-O2 p.131 |
| VSD - DC BUS PRE-REGULATION LOCKOUT | Third consecutive pre-charge/pre-regulation fault. | 160.78-O2 p.131 |
| VSD - GROUND FAULT | Ground fault current above the shutdown value. | 160.78-O2 p.132 |
| VSD - HIGH PHASE A INPUT BASEPLATE TEMPERATURE | Input rectifier phase A baseplate overtemperature. | 160.78-O2 p.132 |
| VSD - HIGH PHASE B INPUT BASEPLATE TEMPERATURE | Input rectifier phase B baseplate overtemperature. | 160.78-O2 p.132 |
| VSD - HIGH PHASE C INPUT BASEPLATE TEMPERATURE | Input rectifier phase C baseplate overtemperature. | 160.78-O2 p.132 |
| VSD - HIGH PHASE A MOTOR BASEPLATE TEMPERATURE | Motor baseplate overtemperature (phase A). | 160.78-O2 p.132 |
| VSD - HIGH PHASE B MOTOR BASEPLATE TEMPERATURE | Motor baseplate overtemperature (phase B). | 160.78-O2 p.132 |
| VSD - HIGH PHASE C MOTOR BASEPLATE TEMPERATURE | Motor baseplate overtemperature (phase C). | 160.78-O2 p.132 |
| VSD - HIGH TOTAL DEMAND DISTORTION | Input current TDD above 25%. | 160.78-O2 p.132 |
| VSD - INVERTER PROGRAM FAULT | Inverter internal code exception. | 160.78-O2 p.132 |
| VSD - INPUT CURRENT OVERLOAD | Input RMS current above the 116.7% threshold for 10 seconds. | 160.78-O2 p.133 |
| VSD - INPUT DCCT OFFSET LOCKOUT | Three consecutive input DCCT offset cycling faults. | 160.78-O2 p.133 |
| VSD - LOGIC BOARD PLUG | Rectifier or inverter DCCT plug not installed. | 160.78-O2 p.133 |
| VSD - MOTOR CURRENT IMBALANCE | Motor phase current imbalance above 30%. | 160.78-O2 p.133 |
| VSD - 105% MOTOR CURRENT OVERLOAD | Motor RMS current above 105% of the 525 A limit for 40 seconds. | 160.78-O2 p.133 |
| VSD - MOTOR CURRENT THD FAULT | Motor current THD above limit. | 160.78-O2 p.133 |
| VSD - PHASE A INPUT DCCT | Input phase A current below the minimum during precharge. | 160.78-O2 p.133 |
| VSD - PHASE B INPUT DCCT | Input phase B current below the minimum during precharge. | 160.78-O2 p.133 |
| VSD - PHASE C INPUT DCCT | Input phase C current below the minimum during precharge. | 160.78-O2 p.133 |
| VSD - PHASE A MOTOR DCCT | Motor phase A DCCT cable/current check failed. | 160.78-O2 p.133 |
| VSD - PHASE B MOTOR DCCT | Motor phase B DCCT cable/current check failed. | 160.78-O2 p.133 |
| VSD - PHASE C MOTOR DCCT | Motor phase C DCCT cable/current check failed. | 160.78-O2 p.133 |
| VSD - PRECHARGE LOCKOUT | Third consecutive pre-charge fault. | 160.78-O2 p.134 |
| VSD - RECTIFIER PROGRAM FAULT | Rectifier internal code exception. | 160.78-O2 p.134 |
| VSD - LINE VOLTAGE PHASE LOCK LOOP | Drive cannot determine the input voltage frequency (50/60 Hz). | 160.78-O2 p.134 |
| VSD - LINE VOLTAGE PHASE ROTATION | Internal phase rotation determinations disagree. | 160.78-O2 p.134 |
| CONDENSER - HIGH PRESSURE | The condenser pressure, as sensed by the Condenser Transducer, has increased to greater than 200… | 160.84-OM1 p.108 |
| CONDENSER - HIGH PRESSURE - STOPPED | The condenser pressure exceeded 170 psig for shells with 235 psig DWP and 264 psig for shells with… | 160.84-OM1 p.109 |
| CONTROL PANEL - INVALID BRAM | On bootup, the panel shall determine whether a 512K BRAM module is installed by a sequence of tests… | 160.84-OM1 p.109 |
| DISCHARGE - HIGH TEMPERATURE | The discharge temperature, as sensed by the Discharge Temperature Thermistor, has increased to… | 160.84-OM1 p.109 |
| INTERNAL ERROR - INVALID BRAM | BRAM is detected to be a size other than 512K. | 160.84-OM1 p.111 |
| ISOLATION VALVES - NOT OPENED | The optional brine freeze protection motorized isolation valves Open output is energized > 40… | 160.84-OM1 p.111 |
| MBC - AMP COMMUNICATION | Set when the MBC control board detects a communication error between the control and amplifier… | 160.84-OM1 p.112 |
| MBC - AMP WATCHDOG | Set when the MBC determines a lapse in internal microprocessor activity on the Amplifier Board… | 160.84-OM1 p.112 |
| MBC - HIGH INPUT VOLTAGE | Main DC supply voltage to the MBC exceeded 165 VDC (150+ 10%). | 160.84-OM1 p.112 |
| MBC - LOW RADIAL OSCILLATOR VOLTAGE | Set when the internal oscillator that drives the radial position sensor coil is low for one… | 160.84-OM1 p.113 |
| MBC - HIGH AXIAL OSCILLATOR VOLTAGE | Set when the internal oscillator that drives the axial position sensor coil is overloaded for one… | 160.84-OM1 p.113 |
| MBC - LOW AXIAL OSCILLATOR VOLTAGE | Set when the internal oscillator that drives the axial position sensor coil is low for one… | 160.84-OM1 p.113 |
| MBC - POWER FAIL LANDING | Set when the panel boots up after a power loss has occurred and the buffer data prior to the… | 160.84-OM1 p.113 |
| MBC - ROTOR CONTRACTION | Set when the MBC has calculated the algebraic difference between the displacement at shaft impeller… | 160.84-OM1 p.113 |
| MBC - SPV UNAUTHORIZED ROTATION | Set when the MBC is commanded to Rotation mode while it is not indicating acceptable to rotate. The… | 160.84-OM1 p.114 |
| MBC - DSP UNAUTHORIZED ROTATION | Set when the MBC detects a rotor speed signal from the VSD while the Levitation Mode is not… | 160.84-OM1 p.114 |
| MOTOR - HIGH ROTOR TEMPERATURE | Occurs when the estimated rotor temperature exceeds 250°F (121°C) for 3 continuous seconds. | 160.84-OM1 p.114 |
| UPS - BATTERY NOT CONNECTED | Initiates a soft shutdown if set while the chiller state is Running. Set during chiller state… | 160.84-OM1 p.116 |
| UPS - INVERTER LOW BATTERY VOLTAGE | Set when all of the following are true for 5 continuous seconds: Battery Voltage Faults is Enabled;… | 160.84-OM1 p.116 |
| VGD ACTUATOR FAULT | The VGD actuator fault digital input has lost voltage either by wiring issue or fault indicated at… | 160.84-OM1 p.116 |
| VGD POSITIONING FAULT | The VGD Position feedback indicates greater or less than the VGD command by 5% for 1 minute… | 160.84-OM1 p.116 |
| VGD FEEDBACK FAULT | The VGD Feedback voltage is below 0.4 VDC or above 4.6 VDC. | 160.84-OM1 p.116 |
| VSD - LOGIC BOARD HARDWARE | After power is applied to the chiller, the VSD logic board performs several internal tests to… | 160.84-OM1 p.119 |
| VSD - PHASE LOCKED LOOP | The VSD must be able to determine the input voltage frequency from the input voltage measurement.… | 160.84-OM1 p.120 |
Compressor
| Message on the display | What it means | Manual |
|---|---|---|
| Control panel warns of excessive landings of the magnetic bearing motor | Notify the nearest Johnson Controls office to request the presence of a Johnson Controls Service… | 160.78-O1 p.22 |
Symptom: abnormally high discharge pressure
| Message on the display | What it means | Manual |
|---|---|---|
| Temperature difference between condensing temperature and water off condenser higher then normal | Condenser tubes dirty or scaled | 160.78-O1 p.24 |
| High discharge pressure | High condenser water temperature | 160.78-O1 p.24 |
| Temperature diffrence between condenser water on and water off higher than normal, with normal discharge temperature | Insufficient condensing water flow | 160.78-O1 p.24 |
Symptom: abnormally low suction pressure
| Message on the display | What it means | Manual |
|---|---|---|
| Temperature difference between leaving chilled water and refrigerant in the evaporator greater than normal with normal discharge temperature. | Variable orifice problem | 160.78-O1 p.24 |
| Temperature difference between leaving chilled water and refrigerant in the evaporator greater than normal with normal discharge temperature | Evaporator tubes dirty or restricted | 160.78-O1 p.24 |
| Temperature of chilled water too low with low motor amperes | Insufficient load for system capacity | 160.78-O1 p.24 |
Symptom: high evaporator pressure
| Message on the display | What it means | Manual |
|---|---|---|
| High chilled water temperature | System overload | 160.78-O1 p.24 |
Automatic battery health test during shutdown
| Message on the display | What it means | Manual |
|---|---|---|
| UPS Battery Health Test Failed - Step X | Displayed when the battery health test fails; X is the step that failed. Fail results occur if: the… | 160.84-OM1 p.144 |
| Warning - UPS - Battery Test Failed | Warning active when the UPS battery health test has failed. | 160.84-OM1 p.144 |
FAULTS & WARNINGS
| Message on the display | What it means | Manual |
|---|---|---|
| WARNING - QUARTERLY SERVICE REQUIRED - CONTACT JCI Event Code: 330 GPIC Warning Code: 145 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: All. | SI0461 p.2 |
| WARNING - YEARLY SERVICE REQUIRED - CONTACT JCI Event Code: 331 GPIC Warning Code: 146 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: All. | SI0461 p.3 |
| WARNING - 3 YEAR SERVICE REQUIRED - CONTACT JCI Event Code: 332 GPIC Warning Code: 147 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: All. | SI0461 p.3 |
| WARNING - CONDENSER - HIGH SMALL TEMP DIFFERENCE Event Code: 13 GPIC Warning Code: 149 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: Running. | SI0461 p.4 |
| WARNING - SYSTEM - REPLACE FILTER-DRIER Event Code: 333 GPIC Warning Code: 150 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: All. | SI0461 p.8 |
| WARNING - QUARTERLY SERVICE REQUIRED - CONTACT JCI | Quarterly Service Required Warning - Manual Reset Warning, no shutdown (Shutdown Type: None). Event… | SI0457 p.2 |
| WARNING - YEARLY SERVICE REQUIRED - CONTACT JCI | Yearly Service Required Warning - Manual Reset Warning, no shutdown (Shutdown Type: None). Event… | SI0457 p.3 |
| WARNING - 3 YEAR SERVICE REQUIRED - CONTACT JCI | 3 Year Service Required Warning - Manual Reset Warning, no shutdown (Shutdown Type: None). Event… | SI0457 p.3 |
| WARNING - CONDENSER - HIGH SMALL TEMP DIFFERENCE | Condenser High Small Temp Difference - Manual Reset Warning, no shutdown (Shutdown Type: None).… | SI0457 p.4 |
PANEL FAULTS & WARNINGS
| Message on the display | What it means | Manual |
|---|---|---|
| MBC - HIGH ROTOR ELONGATION RATE Event Code: N/A GPIC Safety Fault Code: 83 | Safety Fault. Shutdown Type: Immediate. Enable: When Rotor Elongation > 350 µm. Allowed States:… | SI0461 p.12 |
| MBC - HIGH ROTOR ELONGATION RATE | MBC High Rotor Elongation Rate Fault - Safety Fault, Immediate shutdown. Event Code: N/A. GPIC… | SI0457 p.9 |
VSD COOLING PROTECTION - FAULTS & WARNINGS
| Message on the display | What it means | Manual |
|---|---|---|
| WARNING - VSD - HIGH HX APPROACH TEMPERATURE Event Code: N/A GPIC Warning Code: 45 | Manual Reset Warning. Shutdown Type: None. Enable: Always. Allowed States: Running, Soft Shutdown. | SI0461 p.16 |
| VSD - HIGH HX APPROACH TEMPERATURE Event Code: N/A GPIC Safety Fault Code: 94 | Safety Fault. Shutdown Type: Immediate. Enable: Always. Allowed States: Running, Soft Shutdown. | SI0461 p.16 |
| WARNING - VSD - HIGH HX APPROACH TEMPERATURE | VSD High HX Approach Temperature Warning - Manual Reset Warning, no shutdown (Shutdown Type: None).… | SI0457 p.12 |
| VSD - HIGH HX APPROACH TEMPERATURE | VSD High HX Approach Temperature Fault - Safety Fault, Immediate shutdown. Event Code: N/A. GPIC… | SI0457 p.13 |
OUTPUT LINE VOLTAGE ISOLATION BOARD SYMPTOMS
| Message on the display | What it means | Manual |
|---|---|---|
| High Phase (A B or C) Motor Current | High motor current at 4 seconds into run. | SI0401 p.1 |
| WARNING - VSD - DC Bus Active | Warning displayed anytime the DC bus voltage is greater than 50 volts and the drive is not in the… | SI0401 p.1 |
| Incorrect Voltage Values on the VSD Details Screen | Incorrect values shown on the VSD details screen. Phase A output voltage signal is used for the… | SI0401 p.2 |
Expansion I/O - Serial Communication Fault
| Message on the display | What it means | Manual |
|---|---|---|
| Serial Communication Fault | Loss of serial communications with the Expansion I/O LTC I/O Board. In this software version the… | SI0256 p.1 |
MOTOR COOLING
| Message on the display | What it means | Manual |
|---|---|---|
| MOTOR - LOW WINDING TEMPERATURE | New low winding temperature fault added to prevent the chiller from running. | SI0393 p.1 |
LOSS OF SUBCOOLER LIQUID SEAL WARNING
| Message on the display | What it means | Manual |
|---|---|---|
| LOSS OF SUBCOOLER LIQUID SEAL WARNING | Program changed to only check for Loss of Subcooler Liquid Seal when the chiller is loaded above… | SI0393 p.2 |
York Chiller Access Manager
| Message on the display | What it means | Manual |
|---|---|---|
| You do not have the correct access level to make the change. | Access-level denial message shown when an attempted change is rejected. | SI0554 p.2 |
| Your Access Level Doesn't Allow This. | Message shown when the current access level does not permit the attempted action. | SI0554 p.2 |
VSD/MBC Initialization
| Message on the display | What it means | Manual |
|---|---|---|
| VSD - Initialization In Progress Start Inhibit | Start inhibit displayed while VSD initialization is in progress. | SI0554 p.3 |
| MBC - Initialization in Progress Start Inhibit | Start inhibit displayed while MBC initialization is in progress. | SI0554 p.3 |
76 of 229 messages have a page of their own. Other documentation for this model: commissioning and checklists · installation · operation · parts lists · service bulletins · specifications · wiring diagrams. All YORK models: YORK manuals.