Tecumseh AH5540E Service Handbook page 45

Complaint
Compressor starts and runs,
but short cycles on thermal
protector (continued)
Unit runs OK, but run cycle is
shorter than normal (due to
component(s) other than ther-
mal protector)
Unit operates long or continu-
ously
Table 4-1: Troubleshooting Chart
Possible Causes
Return gas too warm
System components, such as
thermostat, control or contac-
tor, not functioning properly
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
Low pressure cut-out due to:
1. Liquid line solenoid leak-
ing
2. Undercharge of refrigerant
3. Restriction in expansion
device
Undercharge of refrigerant
System components, such as
thermostat or contactor not
functioning properly or con-
trol contacts stuck or frozen
closed
Response
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
Refer to the OEM service infor-
mation
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
1. Repair or replace solenoid
valve
2. Refer to the OEM service
information
3. Repair or replace expan-
sion device
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
Refer to the OEM service infor-
mation
37