Baxi POWER HT+ Series Installation, User And Service Manual page 128

12 Troubleshooting
Display
128 128:Loss of flame in op
130 130:Flue gas temp too high
133 133:Safety time exceeded
151 151:BMU internal
152 152:Parameterization
153 153:Unit locked
160 160:Fan speed threshold
162 162:Air pressure switch
171 171:Alarm contact 1 active
178 178:Limit thermostat CH1
179 179:Limit thermostat CH2
321 321:HW outlet sensor
343 343:Solar integration missing
353 353:Casc sens B10 missing
372 372:Limit thermostat CH3
373 373:Extension module 3
384 384:Extraneous ligth
385 385:Mains undervoltage
386 386:Fan speed tolerance
430 430:Dyn water pres too low
432 432:Function ground missing
E110 110:Lockout SLT
Tab.69
Component responsible
Safety thermostat on the combustion
chamber door
Water safety thermostat
Exchanger thermofuse
128 POWER HT +
Description of the error
Flame extinguished.
Cut-off by flue gas sensor for overheating.
Ignition error (4 attempts).
Internal error on heating PCB.
General parameter setting error.
Appliance locked manually.
Fan operation error.
Flue gas pressure switch tripped
ACI board error.
Safety thermostat CH1.
Safety thermostat CH2.
Domestic hot water sensor damaged.
General parameter setting error on the solar system (if incorporating a so­
lar system).
B10 cascade sensor missing.
Safety thermostat CH3.
Extension module 3.
Light incorrect (parasite flame — internal anomaly).
Power supply voltage too low.
Fan threshold speed not reached.
Safety cut-off for absence of circulation (check made by a pressure sen­
sor).
Earthing function not connected.
The code E110 is displayed when overheating occurs due to a breach in
the insulation:
Remove the heat exchanger.
Replace the insulation behind the burner bracket.
Replace the safety thermofuse behind the heat exchanger.
Important
This list is not exhaustive. Other error codes may be displayed.
Contact the accredited technical support service.
Error 110:Lockout SLT
The code 110:Lockout SLT is displayed to signify that one of the following
3 components has been triggered:
Steps to be performed
Switch off and power off the boiler.
Use an ohmmeter to check whether the component is triggered.
In normal operation, the ohmmeter displays 0 Ω (circuit normally closed)
If the safety thermostat on the combustion chamber door has been triggered:
Remove the burner,
Replace the insulation on the combustion chamber door,
Use the tip of a pen to perform a manual reset.
Wait for the water temperature to drop.
Clear the error using the main button.
Switch off and power off the boiler.
Use an ohmmeter to check whether the component is triggered.
In normal operation, the ohmmeter displays 0 Ω (circuit normally closed)
If the exchanger thermofuse has been triggered:
Remove the heat exchanger,
Replace the insulation behind the burner bracket,
Replace the safety thermostat thermofuse behind the heat exchanger.
7702630 - v02 - 11082018