Book: 23227143 (8-24-2010) Rev CPage53
COMPRESSOR CODE 52
IQ Filter Restriction
S18 Differential Switch Circuit:
Circuit Description:
The differential pressure switch connects to the WEDGE controller as shown in
the circuit above. S18 has a switch contact that closes when the pressure across
the IQ air filter is restricted. The dark blue WJDe is the sense line to the WEDGE.
The brown WJDe is the switch common to ground.
Component Location:
S18 IQ air filter differential pressure switch is located on a bracket inside the
machine beside the IQ air filter.
Explanation:
The WEDGE has detected a closed switch contact from the IQ air filter S18
differential pressure switch.
Effect:
Code 52 is a SHUTDOWN condition and will stop the machine. The Restricted IQ Air
Filter diagnostic light will be on solid, the Compressor Malfunction light will be on
solid, and Code 52 will be displayed.
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