59
c l i m a t e m a s t e r. c o m
Trilogy
®
Variable
(VE) Series IOM - 60Hz HFC-410A
C r e a t e d : 4 O c t o b e r, 2 0 1 9
Code
Fault
Mode
Possible Cause
Solution
90
ECM No Communications Fault
ALL
Control signal cable
Check cable
ALL
Bad ECM
If cable is OK, replace motor
ALL
Bad EXM
If cable and motor are OK, replace EXM
ALL
No input voltage
Check input voltage
91
ECM Horsepower
Configuration Fault
ALL
Incorrect motor
Check motor size
ALL
Incorrect unit configuration
Check unit configuration
92
ECM Bad Parameter fault
ALL
Incorrect HP motor detected
Check motor size
ALL
Incorrect unit configuration
Check unit configuration
97
Pressure Sensor Calibration
Fault
ANY
Unit Not Equalized
With unit mode OFF, wait appropriate period for transducers to equalize
OFF
Bad discharge pressure
transducer
Troubleshoot transducer
OFF
Bad suction pressure
transducer
Troubleshoot transducer
98
Loop Flow w/o Loop Pump
Warning
OFF
Loop pump check valve stuck
open
Remove internal check valve and clean. System should also be flushed
using a 100 mesh strainer to remove particles from system.
99
Excessive Transition Mode
Operation
ANY
Stuck Reversing Valve
Run system in service mode to verify operation or perform magnet test.
ANY
Bad Compressor
Check compressor operation.
100
Low Loop Pressure Warning
ANY
Low Loop Pressure
Check loop pressure
ANY
Bad Pressure (DPD) Sensor
Check sensor
ANY
Improperly installed (DPD)
sensor
Remove sensor and reinstall
Troubleshooting