High Iq Filter Restriction - Troubleshooting - Doosan 9/235HA Operation & Maintenance Manual

HIGH IQ FILTER RESTRICTION - TROUBLESHOOTING

STANDARD OPERATION
Service Air
CONDITION
The TITAN controller
received a message over the
J1939 CAN network from the IQ
TCU controller indicating the IQ
filters are starting to restrict air
flow.
The TITAN controller
received a message over the
J1939 CAN network from the IQ
TCU controller indicating the IQ
filters are restricting air flow past
a usable level.
EFFECT
has Code 44 is an ALERT condition and
will not stop the compressor. Code
44 and the ALERT name will be
displayed on the ViewPort.
has Code 52 is a FAULT condition and
will stop the compressor. Code 52
and the FAULT name will be
displayed on the ViewPort.
IQ SYSTEM OPERATION
Service Air
REMEDY
1. Replace IQ filters.
2. Check all harness connections between IQ TCU and PT100 /
PT101 differential pressure sensors. Repair harness as needed.
3. If steps 1 and 2 checkout OK, replace IQ TCU controller.
1. Replace IQ filters.
2. Check all harness connections between IQ TCU and PT100 /
PT101 differential pressure sensors. Repair harness as needed.
3. If steps 1 and 2 checkout OK, replace IQ TCU controller.
OPTIONS 61
9/235HA, 10/215HA