VOGT ICE TUBE-ICE P-24A Service Manual page 83

P24A & P34A Service Manual
Symptom: Low discharge pressure (check gage accuracy)
Fan cycling switch out of adjustment or
defective
Compressor running unloaded or not pumping
efficiently
Ambient temperature low and prevailing winds
blowing through tower
Too much cold water circulating through
condenser
Thaw gas valve #18 leaking through
Symptom: High suction pressure (check gage accuracy)
Compressor running unloaded or not pumping
efficiently
Thaw gas valve #18 leaking through
Defective gage
Symptom: Compressor running unloaded during freeze
Low oil pressure
Unloader solenoid valve open
Unloader mechanism not working properly
12/17/12
Possible Cause
Possible Cause
Possible Cause
Possible Remedy
Check adjustment. Refer to FIGURE 9-3, "Fan
Control". Replace if defective.
Check compressor motor amp.
compressor is running unloaded, the amperage
will only be approximately 60% of normal amp
draw (FLA). Refer to the compressor manual.
Shield tower from prevailing winds to prevent
excessive cooling. Install an indoor sump.
Install a water regulating valve in the water line
form the condenser and control flow by
receiver pressure.
Make sure manual opening stem is in the
automatic (screwed in) position.
replace defective parts.
Possible Remedy
Check compressor motor amp.
compressor is running unloaded, the amperage
will only be approximately 60% of normal amp
draw. Refer to the compressor manual.
Make sure manual opening stem is in the
automatic (screwed in) position.
replace defective parts.
Check pressure with accurate gage and replace
as necessary.
Possible Remedy
Check compressor net oil pressure.
Net oil pressure = oil pressure gage reading
less suction pressure.
Mycom = 17-28 psig
Vilter = 35-50 psig.
Refer to the compressor manual for "Oil
Pressure Adjustment".
Check solenoid coil to make sure it is not
energized. If valve is stuck open, replace
valve.
Refer to compressor manual.
compressor can be loaded manually.
8-9
TROUBLESHOOTING
If the
Repair or
If the
Repair or
Mycom