Rotex GCU compact 315, Installation And Maintenance Instructions Manual

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10 x Faults and malfunctions
Tab. 10-3 Fault codes for temporary malfunctions (can be detected by the firing unit)
Code Component/Designation Error
E2
Firing unit
Temporary malfunction,
burner shutdown, automatic
release when fault condition
no longer active.
Return flow temperature exceeds monitor temperature (overtemperature, no heat dissipa-
tion)
E6 Inflow flow temperature exceeds monitor temperature (overtemperature, no heat dissipation)
E32
Undervoltage with 230 V mains voltage or 18 V internal DC voltage (electronic fault, switch
device on/off).
E43
Return flow temperature (t
R1
) is higher than inflow temperature (t
V1
) + 12 K for longer than
5 s.
E44 Inflow temperature increase too rapid.
E45 Spread (t
V1
- t
R1
) too large.
E66 Interruption during calibration (no heat dissipation, minimum calibration time not met).
E90
Communication interrupted between firing unit and controller PCB control panel (check cable
and plug connections, total reset, replace controller PCB control panel, replace firing unit).
E96 5x reset within 15 min. Another reset is not possible until a further 15 min.
E98
Fault found in the flame amplifier evaluation during the idle state check (electronic fault, short
circuit ionisation electrode or cable).
E99 Firing unit internal fault.
E4
Firing unit
Temporary malfunction,
device is attempting to restart
1x no flame formation at end of safety time (no gas, valves do not open, no ignition sparks)
E5 Flame failure in flame stabilisation (ionisation electrode defective or dirty).
E10 Flame failure at end of the safety time (ionisation electrode defective or dirty).
E24
Value exceeds/falls below min. and max. limits during flame stabilisation or control operation
(blower defective, power supply to blower, electronic fault in blower, cable break).
E50 Flame failure in regular operation (no gas, wind effect, safety gas control block supply).
E61
Regulation deviation during ionisation process too high (1st fault) (burner earthed incorrectly
or faulty supply voltage firing unit, gas flow pressure too low, ionisation electrode bent or oxi-
dised, ionisation track faulty, safety gas control block defective)
E62
– Impermissible gas fitting initialisation during 10 s (1st fault) or
– blower falls below 80 % of the minimum speed within 10 s (one-off fault).
(Burner blower defective, wrong gas type set, missing/incorrect gas nozzle, safety gas con-
trol block defective, gas flow pressure too low)
E63 Internal electronic fault - 1st fault (switch device on/off).
E68 Impermissible GPV offset value (safety gas control block defective).
E69
No stable state in partial load reached during adjustment within the tolerance period (wind
effect, speed fluctuations, blower).