52
13.1 Error Messages And Resetting The Boiler
Error Description Operation
09 Gas valve connection fault Check cable PCB/gas valve and gas valve plug
10 Outdoor sensor fault Check sensor and cable
15 Gas valve command fault
Verify all cables. Replace PCB.
Call authorized SERVICE center
20 Central Heating NTC sensor fault Check sensor and cable
28 Flue NTC heat exchanger sensor fault Check sensor and cable
40 Return NTC sensor fault Check sensor and cable
50 Domestic Hot Water NTC sensor fault Check sensor and cable
53
55 PCB not programmed Call authorized SERVICE center
E72/E92
Combustion test alarm during commissioning /
calibration
E83 OT Communication Failure
Check OT connection, remove power, reconnect OT
connections, if problem persists replace service key.
84-86-87
Communication problem between boiler board and
control unit
Probable short circuit on wiring.
Check cable between control unit and boiler
109 Pre-circulation alarm (temporary fault)
Check correct circulation of water and pump. Check supply
and return wiring is correct.
110
Safety thermostat tripped due to over temperature
(pump probably blocked or air in heating circuit)
Check safety thermostat and cable; check correct circulation
of water and pump
118 Hydraulic pressure too low.
117 Hydraulic pressure too high.
Relieve pressure via relief valve or drain. Ensure water feed
is operating correctly.
125
No circulation of water
(control performed via temperature sensor).
Check correct circulation of water and pump.
Check correct connection of NTC sensor on pipe
128
electrical continuity between burner and ground, gas
Call authorized SERVICE center.
130
Check thermostat, correct circulation of water and pump.
Check status of primary exchanger.
131
Thermo fuse tripped due to over temperature or
the board, or wire harness may be cut.
Check thermo fuse, correct circulation of water and
pump. Check status of primary exchanger. Replace
heat exchanger. Call authorized SERVICE center.
Verify wire harness installation and continuity.
133
Ignition failure
Check correct operation of condensate trap. Check
sensing electrode, spark electrode and cable. Check
Enable automatic calibration function.
Call authorized SERVICE center
134
Gas supply valve blocked
Check gas pressure, sensing electrode, spark
electrode and cable, replace PCB if it necessary.
Call authorized SERVICE center
135 Internal error
Verify all cables. Replace PCB.
Call authorized SERVICE center
160 Fan fault Check fan and cable
162/317
13 - TROUBLE SHOOTING
240012564 REV A, [05/15/2019]
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