Troubleshooting - elco CB-P2.170 G-U/TCG KN Betriebsanleitung

Maintenance

Troubleshooting

Fault diagnosis and repair
Faults
In the event of a malfunction, first check that
the prerequisites for correct
operation are fulfilled:
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 components must be replaced by
parts with the same order number.
Symbol Fault
No heat request
Burner does not start after thermostat shutdown.
No malfunction indicated on the automatic
combustion control unit.
Burner starts briefly when switched on, switches off
and the red LED lights up.
Burner does not start.
Burner does not start.
Normal 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
The burner switches off during
operation.
80
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 flame 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.
05/2014 - Art. Nr. 420010540302
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 flame monitoring.
Adjust the gas throughput.
Check the condition and position of the
ionization sensor in relation to earth.
Check the condition and connections
of the ionization circuit (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.
Remedy