On the display
The panel shows UNIT STATUS VSD COOLING SHUTDOWN. The manual prints the message in this single form and lists it with the general status messages for this chiller.
What it means
The chiller is shut down, but the unit is not idle: it is running all the condenser fans, VSD glycol pump, and VSD fan
in an effort to bring the internal VSD ambient temperature down to an acceptable level. Only when that temperature is back at an acceptable level is the chiller allowed to start. For as long as the condition lasts, the chiller remains shut down.
Why it appears
- The internal VSD ambient temperature is above the acceptable level.
Reset and restart
The manual describes no reset step — the message ends by itself. The chiller remains shut down, with the condenser fans, the VSD glycol pump and the VSD fan running, until the internal VSD ambient temperature is at an acceptable level; at that point the chiller is allowed to start.
Questions engineers ask
What does UNIT STATUS VSD COOLING SHUTDOWN mean on a YORK YVAA?
The chiller is shut down while all condenser fans, the VSD glycol pump and the VSD fan run to bring the internal VSD ambient temperature down to an acceptable level before the chiller is allowed to start.
Why does my YVAA show VSD COOLING SHUTDOWN?
The internal VSD ambient temperature is above the acceptable level, so the unit runs its condenser fans, VSD glycol pump and VSD fan to bring that temperature down before a start is permitted.
How do I clear VSD COOLING SHUTDOWN on a YVAA?
You do not have to clear it. The chiller stays shut down, with the fans and pumps running, until the internal VSD ambient temperature is acceptable, and it is then allowed to start.
Is VSD COOLING SHUTDOWN a fault or a status message?
The manual lists it among the general status messages: it reports that the chiller is shut down while the internal VSD ambient temperature is brought down to an acceptable level before a start.
Messages next to this one
Source
Written from the manufacturer's manuals for the YORK YVAA; every number and designation on this page is checked against them before publication. The row of the manual this message comes from:
All YORK YVAA messages: fault codes · YORK YVAA documentation · YORK manuals