Tecumseh AH5540E Service Handbook page 44

36
SERVICE HANDBOOK
Complaint
Compressor starts, but does
not switch off of start winding
(continued)
Compressor starts and runs,
but short cycles on thermal
protector
Table 4-1: Troubleshooting Chart
Possible Causes
Discharge pressure too high
Internal mechanical trouble in
compressor
Too much current passing
through thermal protector:
1. Extra sources of current
draw
2. Compressor motor has
winding shorted
Low voltage to compressor
(single phase) or unbalanced
voltage (three-phase)
Compressor electrical prob-
lems, such as thermal protec-
tor or run capacitor not work-
ing properly
Discharge pressure too high
Suction pressure too high
Response
If this is a water-utilizing
system, see "Servicing or
Troubleshooting Water-
Utilizing Systems: Preventing
Explosions" on pages 32-33
Also refer to the OEM service
information
See "Checking for Adequate
Compressor Pumping"
page 70
1. Check wiring diagram.
Check for extra sources
of current passing through
thermal protector (such as
fan motors, pumps.) Refer
to the OEM service infor-
mation
2. See "Identifying Compres-
sor Electrical Problems"
on pages 40-41
Turn off system until proper
voltage is restored
See "Identifying Compressor
Electrical Problems" on pages
40-41
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
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
on