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FAULT FINDING
5
5.1 - ERROR CODES
The boiler is fitted with an integrated
in case of malfunction, consents the immediate individuation
of the type of fault directly on the control panel display
In the following fault finding table our purpose is to give some
technical information regarding the solutions to any problems
which could occur during boiler operation or commissioning
of the boiler.
When the fault signalling led (1) is on, press the LIGHT BLUE
key (2) to check the error code on the display (3).
VIOLET
YELLOW
Code:
Description: Mains voltage < 96 Vac
Corrective action: Check that the mains voltage
is <96 Vac, if the mains voltage is correct replace
the control board.
Code:
Description: Insufficient gas pressure
Corrective action: Check the pressure; if the
pressure is correct check the efficiency of the gas
pressure switch and/or the wiring.
Code:
Description: Difference between the heating
temperature sensor (SR) and the heating return
sensor (SRR) too high
Corrective action: Check the installation
Code:
Description: Failure of the heating return sensor
(SRR)
Corrective action: Check the efficiency of the
sensor and/or wiring
diagnostic readout which,
1
LIGHT
BLUE
BLUE
3
Code:
Description: Over high temperature detected by
the heating sensor (SR) >203°F (>95°C)
Corrective action: Check the system's water
circulation
Code:
Description: Loss of flame signal during boiler
operation
Corrective action: Press the reset key on the panel
2
Code:
Description: No flame detected during the ignition
phase.
Corrective action: Press the reset key on the
control panel
Code:
Description: Modulating fan failure
Corrective action: Check the fan's wiring
Code:
Description: Modulating fan failure
Corrective action: Check the fan's wiring
Code:
Description: Low water pression
Corrective action: Fill-up the water circuit
Code:
Description: Main heat exchanger frozen
Corrective action: Carefully de-frost the exchanger
Code:
Description: Intervention of the high limit
thermostat (TL)
Corrective action: Press the reset key on the
control panel
Fault finding
45
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