Repair manual

33
Fault code Cause
Fault Description • Remedial measures
054 Flame loss during operation HYDRONIC has ignited, detected the flame and reports flame loss twice
within an operating period of 60 minutes.
• Check fuel supply (supply and return).
• Measure the amount of CO
2
.
• Replace fuel atomizer nozzle.
• If the fault could not be eliminated by taking the remedial measures listed
above, then replace control unit.
058 Flame not extinguished during delayed shutoff Flame monitor reports 30 seconds after delayed shutoff “ON” that the flame
has not gone out.
• Check heat exchanger and clean as necessary, then measure the amount
of CO
2
.
• Check solenoid valve with the test unit for burner head and, if necessary,
replace.
• If fuel continues to be delivered during the delayed shutoff --> replace
fuel pump.
• If the fault could not be eliminated by taking the remedial measures listed
above, then replace control unit.
060 Temperature sensor - open circuit Temperature outside operating range.
061 Temperature sensor - short circuit • Check plug connection for temperature sensor and line to the control unit.
• Check temperature sensor (see diagram on page 44).
• If the fault could not be eliminated by taking the remedial measures listed
above, then replace control unit.
071 Safety thermal cutout sensor - open circuit Temperature outside operating range.
• Check plug connection for safety thermal cutout sensor and line to the
072 Safety thermal cutout sensor - short circuit control unit.
• Check safety thermal cutout sensor (see diagram on page 45).
• If the fault could not be eliminated by taking the remedial measures listed
above, then replace control unit.
081 Combustion indicator light - short circuit Yellow/white 1 mm² cable from the 18-pin control unit connector,
compartment 8 to the 8-pin cable harness connector, compartment 3, and
from there to the combustion indicator light has short-circuit.
• Check lead and connections and, if necessary, eliminate short circuit.
• Check combustion indicator light and, if necessary, replace.
083 Fault indicator light - short circuit Green 1 mm² cable from the 18-pin control unit connector, compartment 5
to the 8-pin cable harness connector, compartment 6, and from there to
the fault indicator light has short-circuit.
• Check lead and connections and, if necessary, eliminate short circuit.
• Check fault indicator light and, if necessary, replace.
090, 092 Control unit faulty • Replace control unit.
093, 094
097
091 External interference voltage Possible causes:
• Incorrect setting of the ignition electrodes - adjust ignition electrodes.
Remove battery charger or other source of interference voltage.
• If the fault could not be eliminated by taking the remedial measures listed
above, then replace control unit.
4 / Troubleshooting