McQuay M5ACV 030 CR User Manual

Yes
Variable compressor high discharge temperature (Comp 1 discharge overheat)
Compressor stops
> 110°C?
To check & rectify
Yes
Is Temp. sensor
ok? (<100°C?)
Sensor faulty
Check the Air-
Cond. system for
high discharge
tem
p
.
System high discharge pressure
To replace sensor
To rectify
No
Yes
Yes
Yes
Yes
No
Fixed compressor over-current (Comp.2 overload)
Compressor faulty
Check on
compressor
winding
resistance, is it to
spec?
To replace compressor
Yes
Check on
compressor
insulation, is it
ok?
Compressor shorted
Is supply voltage
ok?
Supply voltage failure
To replace compressor
To rectify
No
No
Yes
Check current
reading on
handset against
actual reading, is it
very big different?
Normal
No
Current sensing circuit error
To replace Main board
90

McQuay M5ACV 030 CR Specifications

General

Brand	McQuay
Model	M5ACV 030 CR
Category	Chiller
Language	English