37
Table 4-1: Troubleshooting Chart
Complaint Possible Causes Response
Compressor starts and runs,
but short cycles on thermal
protector (continued)
Return gas too warm If this is a water-utilizing sys-
tem, see "Servicing or Trouble-
shooting Water-Utilizing Sys-
tems: Preventing Explosions"
on pages 32-33. Also, refer to
the OEM service information
Unit runs OK, but run cycle is
shorter than normal (due to
component(s) other than ther-
mal protector)
System components, such as
thermostat, control or contac-
tor, not functioning properly
Refer to the OEM service infor-
mation
High pressure cut-out due to:
1. Insufficient air or water
supply
2. Overcharge of refrigerant
3. Air in system
4. Water leak into refrigerant
side of a water-utilizing
system
1. - 3. Refer to the OEM ser-
vice information
4. See "Servicing or
Troubleshooting Water-
Utilizing Systems:
Preventing Explosions"
on pages 32-33. Also,
refer to the OEM ser-
vice information
Low pressure cut-out due to:
1. Liquid line solenoid leak-
ing
2. Undercharge of refrigerant
3. Restriction in expansion
device
1. Repair or replace solenoid
valve
2. Refer to the OEM service
information
3. Repair or replace expan-
sion device
Unit operates long or continu-
ously
Undercharge of refrigerant If this is a water-utilizing sys-
tem, see "Servicing or Trouble-
shooting Water-Utilizing Sys-
tems: Preventing Explosions"
on pages 32-33. Also, refer to
the OEM service information
System components, such as
thermostat or contactor not
functioning properly or con-
trol contacts stuck or frozen
closed
Refer to the OEM service infor-
mation
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