44
Chapter 4
E
Unit runs OK, but
run cycle is shorter
than normal (due
to component(s)
other than thermal
protector)
1. System components, such as
thermostat, control or contactor, not
functioning properly.
Refer to the OEM service information.
2. High pressure cut-out due to:
a. Insufficient air or water supply.
b. Overcharge or refrigerant.
c. Air in system.
d. Water leak into refrigerant side of a
water-utilizing system.
a. Refer to the OEM service information.
b. Same as “a”.
c. Same as “a”.
d. See “Servicing or Troubleshooting
Water Utilizing Systems: Preventing
Explosions” on page 39. Also, refer to
the OEM service information.
3. Low pressure cut-out due to:
a. Liquid line solenoid leaking.
b. Undercharge of refrigerant.
c. Restriction in expansion device.
a. Refer to the OEM service information.
b. Same as “a”.
c. Same as “a”.
F
Unit operates long
or continuously
1. Undercharge of refrigerant.
If this is a water-utilizing system, see
“Servicing or Troubleshooting Water
Utilizing Systems: Preventing Explosions”
on page 39. Also, refer to the OEM
service information.
2. System components, such as
thermostat or contactor not functioning
properly or control contacts stuck or
frozen closed.
Refer to the OEM service information.
3. Refrigerated or air conditioned space
has excessive load or poor insulation, or
system inadequate to handle load.
Refer to the OEM service information.
4. Evaporator coil iced.
Refer to the OEM service information.
5. Restriction in refrigeration system.
Refer to the OEM service information.
6. Dirty condenser.
Refer to the OEM service information.
7. Filter dirty.
Refer to the OEM service information.
Complaint
Possible Causes
Response
Troubleshooting Chart- continued
