On the display
The panel shows MOTOR - HIGH WINDING TEMPERATURE. The manuals print the message in this single form and list it among the safety shutdown messages. They also describe a warning-level message, WARNING - MOTOR - HIGH WINDING TEMPERATURE, which appears at a lower threshold before the shutdown is reached.
What it means
The motor winding temperature has risen above the programmed High Winding Temperature Shutdown Threshold of 302°F (150°C). One manual summarizes the condition simply as motor winding temperature above the shutdown threshold. This is a safety shutdown, so the chiller is stopped. Note that the safety shutdown does not act on any individual winding temperature sensor that has been disabled with the TEMPERATURE DISABLE Setpoint on the Motor Details Screen.
Why it appears
- Any of the enabled motor winding temperatures exceeded the programmed High Winding Temperature Shutdown Threshold of 302°F (150°C). One manual ties this condition to 3 continuous seconds above the threshold.
- The Average Winding Temperature exceeded the programmed High Winding Temperature Shutdown threshold for 3 continuous seconds.
Setpoints and thresholds
- High Winding Temperature Shutdown Threshold: 302°F (150°C) — the programmed setpoint this safety shutdown acts on.
- Duration: the threshold condition applies for 3 continuous seconds — on the Average Winding Temperature according to one manual, on any enabled winding temperature according to the other.
- Warning level: WARNING - MOTOR - HIGH WINDING TEMPERATURE occurs when any of the enabled motor winding temperatures exceeds 275°F (135°C) for 3 continuous seconds; it clears automatically when all winding temperatures decrease below the warning threshold.
- TEMPERATURE DISABLE Setpoint (Motor Details Screen): an individual winding temperature sensor disabled with this setpoint is ignored by the warning and by the safety shutdown.
Reset and restart
The manuals describe no separate reset step for this message; restarting is governed by the temperature condition alone. The chiller can be started after all winding temperatures decreased to at least 18°F (10°C) below the shutdown threshold and the COMPRESSOR is stopped.
Once every winding temperature is at least 18°F (10°C) below the 302°F (150°C) threshold and the compressor is stopped, the chiller can be started again.
Questions engineers ask
What winding temperature trips the MOTOR - HIGH WINDING TEMPERATURE shutdown on a YORK YMC2?
The programmed High Winding Temperature Shutdown Threshold of 302°F (150°C). The manuals tie the trip to 3 continuous seconds above the threshold — applied to the Average Winding Temperature in one manual and to any enabled winding temperature in the other.
When can the chiller be restarted after this shutdown?
After all winding temperatures have decreased to at least 18°F (10°C) below the shutdown threshold and the COMPRESSOR is stopped. No separate reset step is described for this message.
Is there a warning before the winding temperature shutdown?
Yes. WARNING - MOTOR - HIGH WINDING TEMPERATURE occurs when any enabled winding temperature exceeds 275°F (135°C) for 3 continuous seconds and clears automatically once temperatures fall below the warning threshold.
Does the shutdown respond to a disabled winding temperature sensor?
No. The safety shutdown will not act on any individual winding temperature sensor that has been disabled with the TEMPERATURE DISABLE Setpoint on the Motor Details Screen.
Messages next to this one
The same message on other models
Source
Written from the manufacturer's manuals for the YORK YMC2; every number and designation on this page is checked against them before publication. The row of the manual this message comes from:
All YORK YMC2 messages: fault codes · YORK YMC2 documentation · YORK manuals