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INSTALLATION GUIDE • USER MANUAL
TROUBLESHOOTING
COMPLAINT
11
Compressor starts
but cycles on
overload
12
Compressor
runs but
cycles on...
13
Internal
pressure
safety valve
(IPRV) opens
14
Will not start,
trips on
overload
15
Start Capacitor
damaged or
burned out
G&D CHILLERS, INC.
SYMPTOMS
Internal overload tripping
MUST WAIT 2-3 HOURS TO
CHECK IF IT WILL RESET
...overload
...thermostat
...high pressure switch
---low pressure switch
Refrigerant trapped in
compressor
Discharge pressure exceeds high
pressure setting
Start relay damaged or
burned out
Single phase compressor will not
start
GD-MNL_FNI_PM6-R2020A
•
FIRE & ICE: PORTABLE CHILLER & HEATER
CAUSE
Loss of charge causing
insufficient motor cooling
Voltage is low or
unbalanced if 3-ph
Defective or wrong run
cap
Defective overload
See items 10 and 11
Thermostat differential
set too close
See item 2
See items 3 and 5
Leaking liquid line solenoid
valve (LLSV)
Leaking compressor
valves
Undercharged system
Discharge service valve
closed
High pressure switch
malfunction
Too low or too high line
voltage
Incorrect wiring
Excessive cycling
Incorrect relay
Too high or too low line
voltage
Excessive short cycling
Incorrect wiring
Wrong start or run
capacitor
SOLUTION
Check for leaks, repair, and
recharge
1-ph fix undervoltage
protection, 3-ph correct
phase imbalance
Check and replace
Check current and re-
place compressor if
necessary
See items 10 and 11
Check and widen differential
See item 2
See items 3 and 5
Replace LLSV
Replace compressor
Check for leaks and
recharge
Open discharge service
valve
Reset or replace high
pressure switch, see item 2
Correct and replace relay
Replace relay and rewire per
compressor wiring diagram
See item 11
Check w/ manufacturer
and replace
Correct and replace
See item 11
Replace and rewire per
compressor manufacturer
wiring diagram
Correct and replace
18
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