Daikin GCU compact Series, Инструкция по установке и эксплуатации

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10 Errors and faults
Installation and operating instructions
60
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
Fault Possible cause Possible solution
Burner fan not running
despite burner demand No mains voltage on burner
▪ Insert X1 connector on combustion control until it clicks in
place.
▪ Check voltage at the terminals L-N of the X1 connector.
▪ Check/ renew fuse.
Plug connections on PCB control panel or combus-
tion control are loose ▪ Check/ connect the plug connections.
Burner blower defective (bearing has seized)
▪ Replace the burner blower.
No gas pressure ▪ Inspect the gas connections.
Air in the gas line
▪ Vent the gas line.
Gas control block does not open
▪ Check the plug connections between the safety gas control
block and combustion control and connect correctly.
▪ Check the safety gas control block (zero pressure during igni-
tion).
▪ Replace the safety gas control block.
▪ Replace the combustion control.
No ignition
▪ See "No ignition" fault.
Burner starting is hard Start delay due to bad ignition
▪ Adjust the ignition electrodes.
▪ Check the starting output and adjust as required.
No ignition Ignition electrodes short circuited
▪ Check the ignition electrodes, adjust or replace as required.
Distance of ignition electrodes too large
▪ Check the ignition electrodes and adjust as required.
Ignition electrodes contaminated or humid ▪ Clean the ignition electrodes and check the burner settings.
Ignition electrodes burnt out
▪ Replace the ignition electrodes.
Insulating body cracked ▪ Replace the ignition electrodes.
Ignition transformer defective
▪ Replace the ignition transformer.
Ignition cable defective, sparking ▪ Replace the ignition cable and determine cause.
Automatic combustion control faulty
▪ Replace the combustion control.
Loud operating noises Wrong burner setting ▪ Re-adjust the burner setting.
Bearing damage on burner fan
▪ See "Loudly whistling mechanical noise" fault.
Thermo-acoustics
▪ Insert the supply air manifold (see Fig. 7-3 , item 13) on the
Venturi nozzle.
▪ Re-adjust the burner setting.
Loudly whistling mech-
anical noise Burner blower bearing defective
▪ Replace the burner blower.
STB switch off Water throughput too low due to air inclusion ▪ Vent the system.
Water flow too low due to valves closing too quickly
in the entire heating network
▪ Use slow closing or timed valves, install overflow valve if re-
quired.
Pump down
▪ Check the mains and PWM control signal connection, replace
the pump if required.
Disturbing circulation
noises Pump pressure too high
Badly balanced heat distribution system
▪ Throttle maximum pump output (reduce the setting of the
[Max Perform Pump] parameter gradually – not below 65 %).
(21)
▪ Carry out hydraulic balancing.
Tab. 10-1 Possible faults on the GCU compact
(21)
see "RoCon BF controller” documentation