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Thread: YORK YCAS0330E issues
05-26-2011, 03:34 PM #1Regular Guest
- Join Date
- Apr 2008
YORK YCAS0330E issues
Kennesaw State here again,
We have two of these beasts here...issues after last year replacing 3 of 6 compressors. About a month now we have been expereincing 1 unit with 1 compressor shutting down on "hi motor current", unit 2 has 2 compressors shutting down with no errors, yet sending my Siemens Apogee an alarm regardless, "Alarm -On" . Unit one gives alarm and the "hi motor current" alarm at panel, BMS just legit alarm. HELP!!
We have had York, an two other companies service these things over the last several years, and I am looking for solutions where it does not cost us a new compressor. Open to all, listen to all. Any links please do not ask me to email you. I am looking for the service manaul, not the 88 page overall setup, what it does manual.
05-27-2011, 05:06 AM #2
High Motor Current
High Compressor Motor Current Cutout:
The High Motor Current Safety protects against excessively
high motor current and shuts a system down and
locks it out after only a single occurrence of a rise in
average motor current above the cutout point. Motor
current is monitored using 3 Current Transformers
(CTs) per motor, one on each phase.
Average motor current is monitored after 7 seconds of
compressor operation. The system will be shut down if
average motor current exceeds 115% FLA.
Low Motor Current Cutout / Motor Protector (Hi
Motor Winding Temp Cutout) / Mechanical High
Pressure Cutout / External Motor Overload:
FLA (full load amps) is approximately
1.2 x RLA (rated load amps). RLA is
specified on the motor / chiller nameplate
and is typical current demand under
rated operating conditions in a
fully loaded system. When a system is
fully loaded, typical motor currents
may be at 60 - 85% FLA depending on
You might want to check or have someone qualified to check the MP module settings in micro and module they may be set incorrectly.Arguing with your Boss is like wrestling with a pig in
After a while you realize that while you are getting
dirty, the pig is actually enjoying it.
It is not exactly cheating, I prefer to consider it
creative problem solving.
05-27-2011, 05:26 AM #3