19
REFRIGERATION & ELECTRICAL
DIAGNOSTIC GUIDE (Cont.)
PROBLEM
POSSIBLE CAUSE
SOLUTION
Compressor
will not start
(hums, but
trips on
overload
protector)
Improperly wired
Low voltage to unit
Improperly wired
Relay failing to open
Compressor motor has a winding
open or shorted
Internal mechanical trouble in
compressor
Starting capacitor defective
Relay failing to close
Check actual wiring against diagram
Check power supply. Contact Power
Company
Determine reason and correct
Determine reason and correct or replace
Replace compressor
Replace compressor
Replace start capacitor
Determine reason and correct or replace
Summary of Contents for POLAR TEMP 1000AD
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