McQuay WGS190AW User Manual

OM WGS-5 WGS 130A to 190A 39
Reset: While still running, the event will be reset if saturated condenser temperature <
(High Saturated Condenser - Unload Value – 10
o
F). The event is also reset if the unit mode
is switched to Ice, or the compressor state is no longer Run.
Oil Level Low
Event description (as shown on screen): Oil Level Low Cir N
Trigger: Oil Level Switch input is open for time greater than Low Oil Level Delay while
compressor is in the Run state AND the Low Oil Level Event has not occurred in the past
hour.
Action Taken: Rapid stop circuit
Reset: Compressor state = off
Failed Pumpdown
Event description (as shown on screen): Pumpdown Fail Cir N
Trigger: Circuit state = pumpdown for time > Pumpdown Time set point
Action Taken: Shutdown circuit
Reset: N/A
Power Loss While Running
Event description (as shown on screen): Run Power Loss Cir N
Trigger: Circuit controller is powered up after losing power while compressor was running
Action Taken: Delay start of compressor by time equal to the Start-Start timer set point.
Reset: N/A
Condenser Freeze Protect
Event description (as shown on screen): Cond Frz Protect Cir N
Trigger: Cond Sat Refr Temp < Condenser Freeze SP AND Cond Pump State = Off AND
unit is watercooled
Action Taken: Start condenser pump
Reset: Cond Sat Refr Temp > Condenser Freeze SP + 2
o
F
VFD Fault
Event description (as shown on screen): VFD Fault Cir N
Trigger: VFD enabled and VFD fault input goes low
Action Taken: None
Reset: N/A
Slide Positioning Error
Event description (as shown on screen): Slide Pos Error Cir N
Trigger: [Slide Position > Slide Target + 25% OR Slide Position < Slide Target – 25%] for
time > 5 minutes
Action Taken: None
Reset: Circuit State = Off
Alarm Logging
When an alarm occurs, the alarm type, date, and time are stored in the active alarm buffer
corresponding to that alarm (viewed on the Alarm Active screens) and also in the alarm
history buffer (viewed on the Alarm Log screens). The active alarm buffers hold a record of
all current alarms. The active alarms can be cleared by pressing the Edit key when the end
of the list has been reached by scrolling. Active alarms may only be cleared if at least the
Operator password level is active.

McQuay WGS190AW Specifications

General

Brand	McQuay
Model	WGS190AW
Category	Chiller
Language	English