Ecoflam MAX GAS 105 P CV Manual De Uso página 15

Service
- Troubleshooting
Fault diagnosis and repair
In the event of a malfunction, first check
that the prerequisites for correct
operation are fu llfilled:
1. Is the system connected to the
power supply?
2. Is there any gas pressure?
3. Is the gas shut-off valve open?
4. Are all control and safety devices,
such as the boiler thermostat, low
water level detector, limit switch,
etc. adjusted correctly?
If the malfunction persists, use the
following table.
It is not permitted to repair any
components relevant to safety. These
Symbol fault
No heat request
Sullply voltage lower than minimum
allowed value
Burner starts briefl y when switched on,
switches off and the red LED lights up
Burner does not start
Burner does not start
Low gas pressure
Burner blower starts up
Burner does not start
Burner blower starts up
Burner does not start
The burner starts, the ignition
switches on, then failure
Flame extinguishing
during operation
420010573700
components must be replaced by parts
with the same order number.
Only use original spare parts.
NB: after each operation:
• under normal operating conditions
(doors closed, hood fitted, etc.), check
combustion and check the individual
lines for leaks.
• Record the results in the relevant
documents.
Fault
Thermostats defective or
incorrectly adjusted
Drop in supply voltage or
power failure.
Control unit malfunction
Control unit was
deliberately shut down
Air pressure switch: not in rest position
Incorrect adjustment
Contact is welded
Insufficient gas pressure
Gas pressostat wrongly set or defective
Air pressure switch: the contact does
not close
Flaring during pre-ventilation or pre-
ignition
No flame at the end of the safety period
Gas throughput set incorrectly
Faulty fl ame monitoring circuit
No ignition arc
Electrode(s) short-circuited
Ignition cable damaged or defective
Ignition transformer defective
Automatic combustion control unit
Solenoid valves do not open
Valves jamming
Air pressure switch: contact opens
during startup or during operation
Flame failure during operation
E-BCU diagnostic tool must be used to
read the faults by service personell.
Cause
Adjust the thermostats, replace if
necessary.
Check the cause of the fall in voltage or the
power failure
Replace the control unit.
Unlock the unit
Readjust the pressure switch
Replace the pressure switch
Check gas lines
Clean the filter
Check the gas pressostat or replace the
compact gas unit
Check the pressure transmitter (foreign
bodies) and wiring
Check the valve
Check fl ame monitoring
Adjust the gas throughput
Check the condition and position of the
ionisation sensor in relation to earth
Check the condition and connections of the
ionisation ci rcuit (cable(s) and
measurement bridges)
Adjust, clean or replace electrode(s)
Connect or replace the cable(s)
Replace the transformer
Replace the control unit
Check the cabling between the control
unit and external components
Replace the compact gas unit
Replace the valves
Adjust or replace the pressure switch
Check the ionisation sensor circuit
Check or replace the automatic
combustion control unit
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EN
Remedy
15