145 fault, warning and safety-shutdown messages documented by the manufacturer for the YORK YVAA, from 7 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.
Commissioning
| Message on the display | What it means | Manual |
|---|---|---|
| Sys2 - single phase input Volts | Fault reported by the unit; the unit does not start. | 201.28-NM1.1.EN.GB p.89 |
Unit Warnings
| Message on the display | What it means | Manual |
|---|---|---|
| UNIT WARNING: !! LOW BATTERY !! CHECK SETPOINTS/PROGRAM/OPTIONS/TIME | Low RTC battery condition detected at micropanel power-up; warning displayed indefinitely. Warnings… | 201.28-NM1.1.EN.GB p.102 |
| UNIT WARNING: INVALID NUMBER OF COMPRESSORS SELECTED | Warning displayed indefinitely after the VSD has been initialized. | 201.28-NM1.1.EN.GB p.111 |
| UNIT WARNING: INVALID SERIAL NUMBER ENTER UNIT SERIAL NUMBER | The appearance of this message may mean the chiller has lost important factory programmed… | 201.28-NM1.1.EN.GB p.111 |
Unit safeties
| Message on the display | What it means | Manual |
|---|---|---|
| UNIT HIGH AMBIENT TEMP | Unit safety shutdown on high ambient temperature (auto-reset unit fault; YYYYYYYY indicates FAULT… | 201.28-NM1.1.EN.GB p.112 |
| UNIT LOW AMBIENT TEMP | Unit safety shutdown on low ambient temperature (auto-reset unit fault; YYYYYYYY indicates FAULT… | 201.28-NM1.1.EN.GB p.112 |
| UNIT LOW LEAVING CHILLED LIQUID TEMP | Protects the chiller from an evaporator freeze-up should the chilled liquid temp drop below the… | 201.28-NM1.1.EN.GB p.112 |
| UNIT VSD COMMUNICATIONS FAILURE | Prevents the unit from trying to run if the Chiller Control Board never initializes communications… | 201.28-NM1.1.EN.GB p.113 |
System safeties (faults)
| Message on the display | What it means | Manual |
|---|---|---|
| SYS X HIGH DISCHARGE PRESSURE | Software high discharge pressure cutout. X indicates the system; YYYYYYYY indicates the system is… | 201.28-NM1.1.EN.GB p.113 |
| SYS X HPCO FAULT | Mechanical (hardware) High Pressure Cutout protecting the system from dangerously high discharge… | 201.28-NM1.1.EN.GB p.114 |
| SYS X LOW SUCTION PRESSURE | Programmable Low Suction Pressure Cutout - protects the chiller from an evaporator freeze-up if the… | 201.28-NM1.1.EN.GB p.114 |
| SYS X LOW SUCT PRES SMART FREEZE | Low suction pressure smart freeze safety (R-134a and R-513A refrigeration systems). X indicates the… | 201.28-NM1.1.EN.GB p.114 |
| SYS X LOW MOTOR CURRENT | Motor Current Cutout - shuts the system down when the microprocessor detects the absence of motor… | 201.28-NM1.1.EN.GB p.114 |
| SYS X HIGH DIFF OIL PRESSURE | Protects the compressor from low oil flow and insufficient lubrication, possibly from a dirty oil… | 201.28-NM1.1.EN.GB p.114 |
| SYS X LOW DIFF OIL PRESSURE | Protects the compressor from low oil flow and insufficient lubrication; ensures the compressor is… | 201.28-NM1.1.EN.GB p.115 |
| SYS X HIGH DISCHARGE TEMP | Protects the motor and compressor from overheating. X indicates the system; YYYYYYYY indicates… | 201.28-NM1.1.EN.GB p.115 |
| Low discharge superheat cutout fault (display wording not printed in manual) | Helps protect the compressor from liquid floodback through the economizer line due to a high… | 201.28-NM1.1.EN.GB p.115 |
| SYS X SENSOR FAILURE: | Prevents the system from running when a critical sensor (transducer, level sensor, or motor winding… | 201.28-NM1.1.EN.GB p.116 |
| SYS X HIGH MOTOR TEMP | Prevents a compressor from running when its motor temperature is too high. X indicates the system;… | 201.28-NM1.1.EN.GB p.117 |
| SYS X CONTROL VOLTAGE | Alerts the operator that the 115 V AC Control voltage to one of the systems is missing. X indicates… | 201.28-NM1.1.EN.GB p.117 |
| EDUCTOR CLOG FAULT | Senses a loss of oil return to the compressor - the eductor clog detection safety monitors the… | 201.28-NM1.1.EN.GB p.117 |
Troubleshooting guide
| Message on the display | What it means | Manual |
|---|---|---|
| NO DISPLAY ON CONTROL PANEL UNIT WILL NOT RUN. | Supply to the Panel is missing. High Voltage to the Chiller is missing. Line Fuse is blown. Chiller… | 201.28-NM1.1.EN.GB p.170 |
| LINE FUSE BLOWS. | SCR Diode Module is defective. IBGT Module is defective. VSD Logic Board is defective. SCR Trigger… | 201.28-NM1.1.EN.GB p.170 |
| Chiller fault: Low ambient temperature | Ambient temperature is lower than the programmed operating limit. Ambient Sensor is defective. | 201.28-NM1.1.EN.GB p.170 |
| Chiller fault: High ambient temperature | Ambient Temperature is above the maximum operating limit. Ambient Sensor is defective. | 201.28-NM1.1.EN.GB p.170 |
| Chiller fault: Low leaving chilled liquid | Leaving chilled liquid temperature drops faster than the unit can unload. Water loop is too small.… | 201.28-NM1.1.EN.GB p.170 |
| System fault: Control voltage | System Fuse is blown. | 201.28-NM1.1.EN.GB p.170 |
| SYSTEM FAULT: HIGH DISCHARGE PRESSURE | Coils dirty. Coils are damaged. Fans NOT operating. System is overcharged. | 201.28-NM1.1.EN.GB p.171 |
| SYSTEM FAULT: HIGH DISCHARGE TEMPERATURE | Discharge Temperature Sensor is defective. Condenser Fans NOT operating or are running backwards.… | 201.28-NM1.1.EN.GB p.171 |
| SYSTEM FAULT: HIGH MOTOR TEMPERATURE | High Motor temperature input from one of the sensors. Refrigerant charge low. Excess charge in… | 201.28-NM1.1.EN.GB p.171 |
| SYSTEM FAULT: LOW SUCTION PRESSURE | Low charge. Transducer reads incorrectly. Suction Temp. Sensor reads incorrectly. Low flow.… | 201.28-NM1.1.EN.GB p.171 |
| VSD fault: High baseplate temperature | Coolant level low. Glycol Pump is defective. VSD Board is defective IBGT Module is defective. | 201.28-NM1.1.EN.GB p.172 |
| VSD fault: Low DC Bus voltage | SCR / Diode Module is defective. SCR Trigger Board is defective. | 201.28-NM1.1.EN.GB p.172 |
| No display on control panel unit will not run | Control panel dead; unit will not run. | 201.47-ICOM1.EN.CE p.260 |
| Line fuse blows | Line fuse repeatedly blowing. | 201.47-ICOM1.EN.CE p.260 |
| System fault: low economizer superheat | System shutdown on low economizer superheat. | 201.47-ICOM1.EN.CE p.261 |
| System fault: Discharge pressure limiting | Discharge Transducer is defective. Ambient Temp. very high. Fans not operating. Remote or local… | 201.28-NM1.1 p.199 |
Safety update error messages
| Message on the display | What it means | Manual |
|---|---|---|
| MORE THAN ONE FILE FOUND PRESS THE ENTER KEY TO CONTINUE X | Software update aborted; panel waits for operator acknowledgement. | 201.47-ICOM1.EN.CE p.190 |
| FILE NOT FOUND PRESS THE ENTER KEY TO CONTINUE X | Software update aborted; panel waits for operator acknowledgement. | 201.47-ICOM1.EN.CE p.190 |
| FILE NOT ABLE TO BE LOADED PRESS THE ENTER KEY TO CONTINUE X | Software update aborted; panel waits for operator acknowledgement. | 201.47-ICOM1.EN.CE p.190 |
| SELECTED DEVICE NOT FOUND PRESS THE ENTER KEY TO CONTINUE X | Software update aborted; panel waits for operator acknowledgement. | 201.47-ICOM1.EN.CE p.190 |
| FLASH ERROR XX PRESS THE ENTER KEY TO CONTINUE X | Other internal errors during the update; XX corresponds to the flash card update error codes of… | 201.47-ICOM1.EN.CE p.190 |
Unit warning
| Message on the display | What it means | Manual |
|---|---|---|
| UNIT WARNING QUARTERLY SERVICE REQUIRED - CONTACT JCI | Quarterly service reminder. Warnings are not logged in the history buffer. | 201.47-ICOM1.EN.CE p.191 |
| Unit WARNING YEARLY SERVICE REQUIRED - CONTACT JCI | Yearly service reminder. Warnings are not logged in the history buffer. | 201.47-ICOM1.EN.CE p.192 |
| UNIT WARNING 3 YEAR SERVICE REQUIRED - CONTACT JCI | 3 year service reminder. Warnings are not logged in the history buffer. | 201.47-ICOM1.EN.CE p.192 |
| UNIT WARNING 5 YEAR SERVICE REQUIRED - CONTACT JCI | 5 year service reminder. Warnings are not logged in the history buffer. | 201.47-ICOM1.EN.CE p.192 |
System safeties, faults
| Message on the display | What it means | Manual |
|---|---|---|
| SYS X LOW ECONOMIZER SUPERHEAT | Protects against excessive liquid refrigerant carryover from the economizer (possible EEV, sensor… | 201.47-ICOM1.EN.CE p.198 |
| SYS X ISO VALVE FAILED TO CLOSE | Isolation valve open warning; message displayed and fault code communicated. Shall not prevent the… | 201.47-ICOM1.EN.CE p.198 |
| SYS X ISO VALVE FAILED TO OPEN | Isolation valve closed fault; system fault before compressor start. | 201.47-ICOM1.EN.CE p.198 |
| SYS X HIGH DSCH PRESSURE RATE | High Discharge Pressure Rate Cutout; immediate fault with no 3 s delay. | 201.47-ICOM1.EN.CE p.198 |
| SYS X WARNING CONDENSER FAN VSD FAULT | System Condenser Fan VSD Fault Warning; auto reset warning monitoring the status of the fault input. | 201.47-ICOM1.EN.CE p.198 |
| SYS X WARNING REPLACE OIL FILTER | System Replace Oil Filter Warning; manual reset warning monitoring the status of the oil filter… | 201.47-ICOM1.EN.CE p.198 |
| Low discharge superheat cutout fault | Protection against liquid floodback through the economizer line due to a high flashtank level, and… | 201.28-NM1.1 p.143 |
General status messages
| Message on the display | What it means | Manual |
|---|---|---|
| UNIT STATUS FLOW SWITCH SHUTDOWN | Flow switch is not allowing the chiller to run. Loss-of-flow protection against evaporator… | 201.47-ICOM1.EN.CE p.200 |
| UNIT STATUS VSD COOLING SHUTDOWN | Chiller is shut down while all condenser fans, the VSD glycol pump, and the VSD fan run to bring… | 201.47-ICOM1.EN.CE p.200 |
Software update errors
| Message on the display | What it means | Manual |
|---|---|---|
| MORE THAN ONE FILE FOUND | more than on *.bin file on selected device | 201.28-NM1.1 p.132 |
| FILE NOT FOUND | *.bin file not on selected device | 201.28-NM1.1 p.132 |
| FILE NOT ABLE TO BE LOADED | *.bin file not able to be loaded to flash | 201.28-NM1.1 p.132 |
| SELECTED DEVICE NOT FOUND | update attempted without SD or USB | 201.28-NM1.1 p.132 |
Flash errors
| Message on the display | What it means | Manual |
|---|---|---|
| FILE_BUFFER_APP_HEADER_READ | Error code 90 | 201.28-NM1.1 p.132 |
| CANNOT_CALCULATE_BUFFER_DATA_CRC | Error code 91 | 201.28-NM1.1 p.132 |
| BAD_FILE_BUFFER_DATA_CRC | Error code 92 | 201.28-NM1.1 p.132 |
| SFLASH_DEVICE_WRITE | Error code 93 | 201.28-NM1.1 p.132 |
| BAD_SFLASH_CRC | Error code 94 | 201.28-NM1.1 p.132 |
| APP_CODE_TOO_BIG | Error code 95 | 201.28-NM1.1 p.132 |
| SPI_FLASH_APP_NOT_PRESENT | Error code 96 | 201.28-NM1.1 p.132 |
| SPI_FLASH_READ_ERROR | Error code 97 | 201.28-NM1.1 p.132 |
| CANNOT_READ_DEVICE_CONFIGURATION | Error code 98 | 201.28-NM1.1 p.132 |
Improved clamped voltage design for digital suction pressure transducers
| Message on the display | What it means | Manual |
|---|---|---|
| sensor failure fault | Suction pressure transducer output voltage value below 0.3 V and above 4.7 V results in a… | SI0602 p.1 |
Errors (IPU3 Software Update)
| Message on the display | What it means | Manual |
|---|---|---|
| MORE THAN ONE FILE FOUND PRESS TO CONTINUE (x) | Error message displayed during IPU3 program update. | SI0630 p.5 |
| FILE NOT FOUND PRESS TO CONTINUE (x) | Error message displayed during IPU3 program update. | SI0630 p.5 |
| FILE NOT ABLE TO BE LOADED PRESS TO CONTINUE (x) | Error message displayed during IPU3 program update. | SI0630 p.5 |
| SELECTED DEVICE NOT FOUND PRESS TO CONTINUE (x) | Error message displayed during IPU3 program update. | SI0630 p.5 |
| FLASH ERROR XX PRESS TO CONTINUE (x) | Displayed if other internal errors occur during the software update. The Error Code displayed in… | SI0630 p.5 |
Unit Faults
| Message on the display | What it means | Manual |
|---|---|---|
| 1 Low Ambient Temperature | Unit fault - Panel source | SI0630 p.16 |
| 2 High Ambient Temperature | Unit fault - Panel source | SI0630 p.16 |
| 3 Low Chilled Liquid Temperature | Unit fault - Panel source | SI0630 p.16 |
| 4 VSD Initialization Failure | Unit fault - Panel source | SI0630 p.16 |
| 5 Low RTC Battery Voltage | Unit fault - Panel source | SI0630 p.16 |
| 6 Invalid Number of Compressors Selected | Unit fault - Panel source | SI0630 p.16 |
| 7 VSD Communications Failure | Unit fault - Panel source | SI0630 p.16 |
| 8 Pre-charge Low DC Bus Voltage | Unit fault - VSD source | SI0630 p.16 |
| 9 Pre-charge DC Bus Voltage Imbalance | Unit fault - VSD source | SI0630 p.16 |
| 10 High DC Bus Voltage | Unit fault - VSD source | SI0630 p.16 |
| 11 Low DC Bus Voltage | Unit fault - VSD source | SI0630 p.16 |
| 12 DC Bus Voltage Imbalance | Unit fault - VSD source | SI0630 p.16 |
| 13 High VSD Ambient Temperature | Unit fault - VSD source | SI0630 p.16 |
| 14 Single Phase Input | Unit fault - VSD source | SI0630 p.16 |
| 15 VSD Power Supply Fault | Unit fault - VSD source | SI0630 p.16 |
| 16 VSD Logic Board Fault | Unit fault - VSD source | SI0630 p.16 |
| 17 Motor Current Overload (Hardware) | Unit fault - VSD source | SI0630 p.16 |
| 18 CT Plug Fault | Unit fault - VSD source | SI0630 p.16 |
| 19 High Harmonic Filter Temperature | Unit fault - Panel source | SI0630 p.16 |
| 20 Evap Anti-Freeze Pump Fault | Unit fault - Panel source | SI0630 p.16 |
| 22 Replace RTC Battery | Unit fault - Panel source | SI0630 p.16 |
System Faults
| Message on the display | What it means | Manual |
|---|---|---|
| 27 High Discharge Pressure (Software) | System fault - Panel source | SI0630 p.16 |
| 28 High Differential Oil Pressure | System fault - Panel source | SI0630 p.16 |
| 29 Low Differential Oil Pressure | System fault - Panel source | SI0630 p.16 |
| 30 Low Suction Pressure | System fault - Panel source | SI0630 p.16 |
| 31 High Discharge Temperature | System fault - Panel source | SI0630 p.16 |
| 33 Eductor Clog Fault | System fault - Panel source | SI0630 p.17 |
| 34 Sensor Failure | System fault - Panel source | SI0630 p.17 |
| 35 Low Motor Current | System fault - Panel source | SI0630 p.17 |
| 36 High Motor Temperature | System fault - Panel source | SI0630 p.17 |
| 37 Pre-charge Low DC Bus Voltage | System fault - VSD source | SI0630 p.17 |
| 38 Pre-charge DC Bus Voltage Imbalance | System fault - VSD source | SI0630 p.17 |
| 39 High DC Bus Voltage | System fault - VSD source | SI0630 p.17 |
| 40 Low DC Bus Voltage | System fault - VSD source | SI0630 p.17 |
| 41 DC Bus Voltage Imbalance | System fault - VSD source | SI0630 p.17 |
| 42 High Motor Current | System fault - VSD source | SI0630 p.17 |
| 43 Motor Current Overload (Software) | System fault - VSD source | SI0630 p.17 |
| 44 IGBT Gate Driver Fault | System fault - VSD source | SI0630 p.17 |
| 45 High Baseplate Temperature | System fault - VSD source | SI0630 p.17 |
| 46 Single Phase Input | System fault - VSD source | SI0630 p.17 |
| 47 VSD Run Signal Fault | System fault - VSD source | SI0630 p.17 |
| 48 High Discharge Press (Hardware - HPCO) | System fault - Panel source | SI0630 p.17 |
| 50 Control Voltage Fault | System fault - Panel source | SI0630 p.17 |
| 51 Low Discharge Superheat | System fault - Panel source | SI0630 p.17 |
| 52 Low Suction Pressure Smart Freeze | System fault - Panel source | SI0630 p.17 |
| 53 Isolation Valve Failed to Close Warning | System fault - Panel source | SI0630 p.17 |
| 54 Isolation Valve Failed to Open Fault | System fault - Panel source | SI0630 p.17 |
| 55 High Discharge Pressure Rate | System fault - Panel source | SI0630 p.17 |
| 56 Condenser Fan VSD Warning | System fault - Panel source | SI0630 p.17 |
| 57 Low Economizer Superheat | System fault - Panel source | SI0630 p.17 |
Faults and Warnings
| Message on the display | What it means | Manual |
|---|---|---|
| SYS X WARNING - REPLACE OIL FILTER | System Replace Oil Filter Warning (Warning Code: 5) | SI0476 p.3 |
ZIEHL-ABEGG Variable Speed Fan - Motor Fault Codes (LED Status/Fault Light)
| Message on the display | What it means | Manual |
|---|---|---|
| LED OFF | No voltage supply. Unit is switched off and will automatically turn on when the voltage has been… | SI0640 p.3 |
| 1 No enable = OFF | No enable = OFF | SI0640 p.3 |
| 2 Temperature management active | The device has integrated active temperature management to protect the device from damage caused by… | SI0640 p.3 |
| 3 Error rotor position | Determination of the rotor position has failed. | SI0640 p.3 |
| 4 Line failure (only for 3 ~ types) | The device is provided with a built-in phase-monitoring function for the mains supply. | SI0640 p.3 |
| 5 Motor blocked | If after 8 seconds of attempting to rotate no speed is measured, the fault “Motor blocked” is… | SI0640 p.3 |
| 6 Failure power module | Failure power module | SI0640 p.3 |
| 7 Intermediate undervoltage | If the DC-link voltage drops below a specified limit, the device will switch off. | SI0640 p.3 |
| 8 Intermediate circuit overvoltage | If the DC-link voltage increases above a specified limit, the motor will switch off. | SI0640 p.3 |
| 9 Cooling down period power module | Cooling down period power module for approx. 60 sec. | SI0640 p.3 |
| 10 Communication fault | If the communication watchdog is active, it signals that MODBUS communication is interrupted. | SI0640 p.4 |
| 11 Error motor start | If a starting command is given (enable available and Setpoint > 0) and the motor does not start to… | SI0640 p.4 |
| 12 Line voltage too low | If the DC-link voltage drops below a specified limit the device will switch off. | SI0640 p.4 |
| 13 Line voltage too high | If the line voltage increases above a specified limit, the motor will switch off. | SI0640 p.4 |
| 14 Error peak current | If the motor current increases above the specified limit (even in a short timeframe) the device… | SI0640 p.4 |
| 17 Temperature alarm | Excess of the max. permissible internal temperature. | SI0640 p.4 |
| 18 System error | Device has detected a system error. Only limited operation or no operation is possible. | SI0640 p.4 |
| 20 a) Vibration values | If the vibration velocity rises above the specified limits, an error message is issued. | SI0640 p.4 |
| Continuous short flash Internal communication error | Internal communication failure. Fault indication. | SI0640 p.5 |
| 1 Long, 2 Short MODBUS Recovery function | A failure in the MODBUS communication has been detected, e.g. incorrect communication parameters… | SI0640 p.5 |
16 of 145 messages have a page of their own. Other documentation for this model: commissioning and checklists · installation · parts lists · service bulletins · specifications. All YORK models: YORK manuals.