56
•
MN-35947
•
Rev 22
•
10/22
•
Combitherm® CT PROformance™ and CT Classic Series Installation Manual
Troubleshooting – Error Codes
Error
Code
Error Call Out in Display
Description of Error
Possible Cause(s) and Remedies
E28
B10 - Point 3 - Core
Temperature Probe Multipoint
Fault
Multipoint core-temperature probe
malfunctioned or disconnected.
— Multipoint core-temperature probe (B10)
malfunctioned.
— Multipoint core-temperature probe (B10) wires
disconnected.
E29
B10 - Point 4 - Core
Temperature Probe Multipoint
Fault
Multipoint core-temperature probe
malfunctioned or disconnected.
— Multipoint core-temperature probe (B10) defective.
— Multipoint core-temperature probe (B10) wires
disconnected.
E34
Steam Generator Drain Pump
Fault
If water level does not drop below lower
water level probe after three minutes
when steam generator drain pump is
activated in cleaning program.
— Calcium build-up or blockage in steam generator
drain pump.
— Boiler drain pump has malfunctioned.
— Water-level probe has malfunctioned.
E36
Steam Temperature High
In Steam program, cavity temperature
probe N6 is measuring in excess of
395ºF (200ºC) for more than 60 seconds.
In Combination program, cavity
temperature probe N6 is measuring in
excess of 600ºF (315ºC), for more than
60 seconds.
In Retherm program, cavity temperature
probe N6 is measuring in excess of
395ºF (200ºC), for more than 60 seconds.
In Cleaning program, cavity
temperature probe N6 is measuring in
excess of 395ºF (200ºC), for more than
60 seconds.
— Water supply is shut off.
— Water pressure is low.
— Calcium build-up on water injection pipe.
— Water
fl
ow restrictor has malfunctioned or has
calcium build-up.
— Water solenoid valve (Y1) has malfunctioned.
— Steam by-pass hose blocked.
E40
B3 Fault
B3 probe shorted to ground.
— Probe (B3) miswired probe or has malfunctioned.
E41
B4 Fault
B4 probe shorted to ground.
— Probe (B4) miswired probe or has malfunctioned.
E42
B5 Fault
B5 probe shorted to ground.
— Probe (B5) miswired probe or has malfunctioned.
E43
N6 Fault
N6 probe shorted to ground.
— Probe (N6) miswired probe or has malfunctioned.
E44
N8 Fault
N8 probe shorted to ground.
— Probe (N8) miswired probe or has malfunctioned.
E45
B10 Fault
B10 probe shorted to ground.
— Probe (B10) miswired probe or has malfunctioned.
E46
B10 - Point 1 Fault
B10 probe shorted to ground.
— Probe (B10) miswired probe or has malfunctioned.
E47
B10 - Point 2 Fault
B10 probe shorted to ground.
— Probe (B10) miswired probe or has malfunctioned.
E48
B10 - Point 3 Fault
B10 probe shorted to ground.
— Probe (B10) miswired probe or has malfunctioned.
E49
B10 - Point 4 Fault
B10 probe shorted to ground.
— Probe (B10) miswired probe or has malfunctioned.
E51
No Water in Steam Generator
Applies only to roll-in models.
Lower-water-level probe (B2) does not
detect water within 5 minutes after
water-solenoid-valve (Y1) is activated.
— Water supply is shut off.
— Water pressure is low.
— Water-level probe (B1) has calcium build-up.
— Fill-water solenoid valve (Y1) has malfunctioned.
— Drain pump elbow is leaking.
— Steam generator drain cap is missing.
— Steam generator drain pump has malfunctioned.
— Drain pump elbow leaking.
— Relay board has malfuntioned.
E53
Fan Motor High Temperatures
Applies to table-top models and upper
fan motors on roll-in models.
Fan motor does not spin, resulting in
overheating. Detected by motor coil
safety thermo element. Temperature is
above 320°F (160°C).
— Motor high limit open or wired incorrectly.
— If LED on motor control
fl
ashes, see error codes for
motor control.
— Motor or fan wheel locked.
— Fan wheel damaged.
E54
Lower Fan-Motor High
Temperature
Applies only to roll-in models.
Lower fan motor does not spin,
resulting in overheating. Detected
by motor coil safety thermo element.
Temperature is above 320°F (160°C).
— Motor or fan wheel locked.
— If LED on motor control
fl
ashes, see error codes for
motor control.
— Motor high limit open or wired incorrectly.
Error Codes
