ClimateMaster Trilogy Variable (VE) Series, Installation, Operation & Maintenance Instructions Manual, Page: 55 / 72

55
c l i m a t e m a s t e r.c o m
Trilogy
®
Variable
(VE) Series IOM - 60Hz HFC-410A
R e v i s i o n D a t e : 2 2 D e c e m b e r, 2 0 2 1
Troubleshooting (Cont.)
Code Fault Mode Possible Cause Solution
10 ECM Low RPM
ALL Blower does not operate Check blower line voltage
ALL Blower does not operate Check blower low voltage wiring
ALL Blower operating
with incorrect airflow
Wrong unit size selected - check unit configuration
ALL Blower operating with
incorrect airflow
Wrong unit family selected - check unit configuration
ALL Blower operating
with incorrect airflow
Incorrect motor size
ALL Blower operating
with incorrect airflow
Incorrect blower selection
11 Low Air Coil Pressure
CL Low Return Air temp Bring air temp within design parameters
CL Plugged air filter Clean or replace air filter
CL Bad Suction Pressure
Transducer
If supply voltage at BLK and GND wires reads 4.5-5.5 VDC but signal
at GND and RED is not between 0.5-4.5 VDC, replace sensor
CL Insufficient charge Check for refrigerant leaks
12 Control Fault
ANY EXM not properly programmed reprogram EXM using Service Tool
ANY Bad EXM replace EXM
13 Low Pump Flow
ALL Flat loop Flush and repressurize loop.
ALL Air pocket Flush and repressurize loop.
ALL System setup for single and
not parallel pumping.
Change unit loop pump configuration.
ALL Pump Failure Check pump.
ALL Bad Flow Sensor Check flow sensor.
14 High Discharge temp
ALL Insufficient charge Check for refrigerant leaks
HT Water temp out of range Bring water temp within design parameters
CL Air temp out of range Bring air temp within design parameters
ALL Faulty EEV Check EEV operation, superheat will be high as well
ALL Fouled heat exchanger Clean appropiate coil
15 Discharge Pressure Sensor
ALL Bad tranducer If supply voltage at BLK and GND wires reads 4.5-5.5 VDC but signal
at GND and RED is not between 0.5-4.5 VDC, replace sensor
ALL Bad wiring harness Check harness
ALL Bad EXM If supply voltage across BLK and GND doesn’t read 4.5-5.5 VDC
replace EXM
ALL Bad EXM If voltage across GND and RED reads between 0.5-4.5 VDC but fault
still exists, replace EXM
16 Suction Pressure Sensor
ALL Bad tranducer If supply voltage at BLK and GND wires reads 4.5-5.5 VDC but signal
at GND and BLU is not between 0.5-4.5 VDC, replace sensor
ALL Bad wiring harness Check harness
ALL Bad EXM If supply voltage across BLK and GND doesn’t read 4.5-5.5 VDC
replace EXM
ALL Bad EXM If voltage across GND and BLU reads between 0.5-4.5 VDC but fault
still exists, replace EXM
17 Space temp Sensor
ALL Bad thermostat Check thermostat to ensure that it is operating
ALL Bad EXM Use T-Stat service mode to check other temp values as well as space
humidity. If not, replace EXM
ALL Bad wiring Check wiring between the thermostat and EXM
ALL Incorrect master/slave setting Check that DIP switch 1 is set to the ON position
18 Space Humidity Sensor
ALL Bad thermostat Check thermostat to ensure that it is operating
ALL Bad EXM Use T-Stat service mode to check other temp values as well as space
temp. If not, replace EXM
ALL Bad wiring Check wiring between the thermostat and EXM
ALL Incorrect master/slave setting Check that DIP switch 1 is set to the ON position