Parker AC890PX Series, Product Manual

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9-10
Trips & Fault Finding
AC890PX AC Drive
Keypad Display Description Possible Reason for Trip
STACK MISMATCH
U, V & W CD Modules are not
the same build
Check U, V & W CD Modules are the same voltage/power rating
CM OVERTEMP Control Module heatsink too hot Shorted/ fan supply overloaded
PCM COMMS LOSS RS485 communication problem
between the PCM and CD or
pump module Cable unplugged or damaged.
Check connections at PCM and pump module at the bottom of the
power stack.
CD module failed.
Excessive noise due to grounding or connection problem
elsewhere in system.
Check for loose power connections, broken shields, failed noise
mitigation parts (like LCL filter), etc.
Pump module failed.
REF PUMP BOARD Pump module detected a
problem Bad thermistor or thermistor connection
REFRIGERANT TEMP Refrigerant temperature > 60°C Condenser not cooling properly or ambient too high.
Check condenser functioning properly, .
SHARING FAULT Parallel CD modules on a phase
are not sharing (over 15%
imbalance) Bad cable between PCM and CD (no firing signal).
Replace RJ45 cable between CD module and CM (or PCM).
Bad CD module.
Replace CD module.
CD module not plugged in fully.
Tighten all CD modules until fully seated.
Sharing reactor failure (bent or shorted).
Replace sharing reactor.
V PHASE MISSING The CAT5 cable is not being
detected in the CD Module Make sure the CAT5 cable is seated properly in the CD Module.
W PHASE MISSING The CAT5 cable is not being
detected in the CD Module Make sure the CAT5 cable is seated properly in the CD Module.