On the display
The display shows VSD - GROUND FAULT. This is the only wording the manual prints for the message, and the manual lists it among the safety shutdown messages of the chiller.
What it means
The message reports ground fault current above the drive's shutdown value. The shutdown value is keyed to the model of the drive: the tables printed with this message give a ground current shutdown value for each drive model, so the value that applies is the one for the model of drive in the chiller.
Why it appears
- The message is generated when
the sum of the three phases of instantaneous input current values are greater than the shutdown value for a period of 1 second
— with the shutdown value being the one listed for the given model of drive.
Setpoints and thresholds
The tables for this message list a ground current shutdown value per drive model:
- Drive model 490 — 40 Amps.
- Drive model 0490 — 40 Amps.
- Drive model 744 — 120 Amps.
- Drive model 0774 — 120 Amps.
- The tables also carry shutdown values for further drive models.
Reset and restart
Restart is tied to the condition itself: When the condition clears, the chiller can be started after the CLEAR FAULTS button is pressed.
Questions engineers ask
What does VSD - GROUND FAULT mean on a YORK YMC2?
It reports ground fault current above the drive's shutdown value. The trigger is the summed instantaneous input current of the three phases staying above that value for 1 second.
What is the ground fault shutdown value of the YORK YMC2 drive?
The ground current shutdown value is keyed to the drive model: drive models 490 and 0490 have 40 Amps, drive models 744 and 0774 have 120 Amps.
How do I clear VSD - GROUND FAULT on a YORK YMC2?
Once the condition has cleared, press the CLEAR FAULTS button; the chiller can then be started.
How long does the condition have to last before VSD - GROUND FAULT is generated?
The condition has to persist for 1 second before the message is generated.
Messages next to this one
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