72
E110/
R
438
Boiler max temperature exceeded for over
temperature (probable pump jammed or air
in the circuit)
Check the correct circulation of the water and the pump
E110
Safety thermostat sensor tripped
Check the sensor
E117
566
Water pressure HIGH (>43 psig) (>
2.9 bar)
Check the water pressure
E118
Water pressure LOW (<7 psig) (< 0.5
bar)
Check the water pressure
E124
Condensate pump alarm
Check the external condensate pump
E125/
R
500
Water circulation fault (over temperature)
Check the correct circulation of the water and the pump
E125/
R
501
Water circulation fault (flatness on the flow) Check the correct circulation of the water and the pump
E125/
R
502
Water circulation fault (flatness on the
return)
Check the correct circulation of the water and the pump
E127
Temperature Anti-legionella not reached
E128/
R
Safety error for frequently loss of flame
Check the sensing electrode and the cable, flue
recirculation, enable the automatic calibration function
before to replace components..
E129
Safety error for frequently loss of flame
with max correction during the ignition
Check the sensing electrode and the cable, flue
recirculation, enable the automatic calibration function
before to replace components..
E130/
R
528
Flue NTC sensor tripped (warning or
lockout)
Check the thermostat, the correct circulation of the water
and the pump.
Check the status of the primary exchanger
E131
Flue thermostat sensor tripped (lockout)
Check the sensor, correct circulation of the water and the
pump.
Check the status of the primary exchanger
E132
Ignition failure (<35 tries)
Boiler will continue ignition attempts.
E133/
R
0
Gas supply fault (no ignition)
Check the power supply, sensing electrode, spark electrode
and cable. Check flue recirculation, gas supply pressure,
continuity between burner and ground
E133/
R
1
No ignition (frozen / obstruction condensate
trap)
Check the correct operation of the condensate trap
E134/
R
Gas valve open without gas
Check the gas pressure, sensing electrode, spark electrode
and cable, replace the PCB if it necessary
E135
Internal error
Verify cables; Replace PCB
E154
Plausibility test (flow/return)
Check the correct circulation of the water and the pump,
check the correct position of the sensors
E160
Fan fault
Check the fan and the cable
E169
Air pressure switch closed
Check obstruction on the flue pipe
E178
Low temperature safety thermostat
Check the sensor and the correct circulation of the water
and the pump
E317/162
Wrong power supply electrical frequency
(Hz)
Check the frequency (Hz) and the power supply
E384/164/
R
Fault flame (parasitic flame)
Check the correct operation of the gas valve, humidity on
the PCB and on the detection electrode
E385/165
Under voltage
Check the power supply (V~)
ERROR
CODE
INTERNAL
CODE
ERROR
ACTION
R
= REQUIRES RESET
PN 240012369, REV A [08/31/2018]
13 - TROUBLE SHOOTING
