Book: 23227143 (8-24-2010) Rev CPage54
COMPRESSOR CODE 52
Troubleshooting Steps
Action Result
Step 1:
Check IQ air filter.
Clogged filter
Step 2:
Check all harness connections between WEDGE
and S18 differential pressure switch.
Repair harness as needed
Step 3:
Disconnect S18 from harness. Using a multimeter,
measure resistance between across switch terminals
1 and 2 on differential pressure switch.
Resistance value measured
should be open, if not replace
S18 differential pressure
switch
Step 4:
If Steps 1 and 2 checkout OK, replace WEDGE.
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