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54
G e o t h e r m a l H e a t i n g a n d C o o l i n g
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
Troubleshooting (Cont.)
Code
Fault
Mode
Possible Cause
Solution
28
No Loop Pump Feedback
ALL
No line voltage
Check power cable or unit voltage
ALL
Control signal cable
Check signal cable and verify that voltage is between 3-4 VDC with the
pump OFF and between 0-2 VDC with the pump ON.
ALL
Bad EXM
If a feedback signal is present but the EXM doesn’t read it properly the board
is damaged. Replace the EXM.
29
Low Loop Pump Voltage
ALL
Low pump voltage
Check line voltage to the pump and increase
30
Loop Pump Locked Rotor
ALL
contaminants or trash in the
pump impeller
Remove the pump head, clean out contaminants and flush system
ALL
Seized impeller
Replace pump.
31
Loop Pump Voltage Shutdown
ALL
Low pump voltage
Check line voltage to the pump
32
Loop Pump Sensor
ALL
Bad RPM sensor
Replace pump if the line voltage and control signal is present at the pump
but it doesn’t operate.
38
Suction temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
39
Discharge temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
42
Air Coil Liquid temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
43
Air Coil Vapor temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
44
Water Coil Liquid temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
45
Water Coil Vapor temp Sensor
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
47
Spare temp 1 sensor fault
ALL
Bad thermistor
Check temp vs. resistance curve per calculator
ALL
Bad wiring harness
Check wiring harness
ALL
Bad EXM
If harness and sensor are fine board is bad, replace EXM
51
High Suction Pressure Warning
ALL
Overcharged
Check superheat and subcooling vs. typical operating condition table
ALL
Faulty discharge transducer
Check transducer
CL
High EWT
Bring water temp within design parameters
HT
High EAT
Bring air temp within design parameters
Содержание Trilogy VE 0930
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Страница 65: ...65 climatemaster com Trilogy Variable VE Series IOM 60Hz HFC 410A Created 4 October 2 0 1 9 Notes Notes...
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