| Document type | Service Information Letter |
|---|---|
| Document number | SI0487 |
| Equipment | YLAA Scroll Chiller |
| Brand | YORK |
| File size | 1.6 MB |
Fault codes in this document
Fault Code (Red LED color)
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Phase failure (Red LED, 1 pulse) | Automatic restart once phase failure is corrected | 4 | ||
| Power module overheated (Red LED, 3 pulses) | Power cycle required | 4 | ||
| Internal communications error between primary/secondary controller (Red LED, 4 pulses) | Primary = electronics, Secondary = motor | Power cycle required | 4 | |
| Motor overheated (Red LED, 6 pulses) | Power cycle required | 4 | ||
| Hall sensor error (Red LED, 7 pulses) | Power cycle required | 4 | ||
| Motor blocked (Red LED, 8 pulses) | Automatic restart after blockage is cleared | 4 | ||
| Speed limit exceeded (Red LED, 9 pulses) | Automatic restart | 4 | ||
| Rotor position sensor calibration error (Red LED, 11 pulses) | Power cycle required | 4 | ||
| DC-link undervoltage (Red LED, 13 pulses) | Automatic restart after undervoltage is cleared | 4 |
Fault Code (Yellow LED color)
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Current limitation in action (Yellow LED, 1 pulse) | Current limited to prevent damage of the electronics | 4 | ||
| Line impedance too high (Yellow LED, 2 pulses) | DC link voltage is instable | 4 | ||
| Power limiter in action (Yellow LED, 3 pulses) | Derating is active | 4 | ||
| Output stage temperature high (Yellow LED, 4 pulses) | Temperature > 105°C | 4 | ||
| Motor temperature high (Yellow LED, 5 pulses) | Temperature > 130°C | 4 | ||
| Temperature inside electronics high (Yellow LED, 6 pulses) | Temperature > 105°C | 4 | ||
| DC-link voltage low (Yellow LED, 7 pulses) | DC-link < 460 V | 4 | ||
| Calibration of rotor position (Yellow LED, 9 pulses) | Calibration of rotor position sensor in progress | 4 | ||
| Cable break at analog or PWM input for analog set value (Yellow LED, 11 pulses) | Check wiring. NOTE: This fault code may be present if the command signal to the motor is 0%. Increase command signal to check if wiring issue. | 4 | ||
| DC-link voltage high (Yellow LED, 13 pulses) | DC-link > 850 V | 4 | ||
| Line-voltage high (Yellow LED, 15 pulses) | U1_peak > 850 VDC | 4 | ||
| Shedding function active (Yellow LED, 16 pulses) | Shedding function is active and fan is blocked | 4 |
Every row above cites the page of this document it came from, and each one is re-read against that page by an automatic check before publication.
Manufacturer document, published here as reference material for equipment we supply. The original lives at docs.johnsoncontrols.com. The rights holder may ask us to take it down — we will.