ROBUA G Series, Инструкция по установке, эксплуатации и обслуживанию

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Maintenance
42
7
7.2 SCHEDULED ROUTINE
MAINTENANCE
Perform the operations in the following Table 7.1 p. 42
on an annual basis.
Table 7.1
Scheduled routine maintenance
Next-R G K M
Ordinary scheduled maintenance
Check of the unit
clean the burner √ √ √ √
clean the ignition and flame sensor electrodes √ √ √ √
clean the fan √ √ √ √
clean the blower/exhaust fan √ √ √ √
check the % value of CO
2
√ √ √ √
check the unit safety devices √ √ √ √
check that the condensate discharge is clean - √ - -
7.3 RESETTING THE TEMPERATURE LIMIT
THERMOSTAT
The temperature limit thermostat stops the burner in case
of appliance overheating.
The reset of the gas unit heater lock by limit thermostat
trip is manual and takes place via the remote control.
Resetting of the temperature limit thermostat
should be carried out by qualified service per-
sonnel, after removing the cause of overheating.
The intervention of the temperature limit ther-
mostat ALWAYS indicates an abnormal condition.
Before resetting, it is therefore advisable to search
for the reasons that led to the unit overheating. If
frequent stops occur, contact Robur TAC.
7.4
TROUBLESHOOTING
If the gas unit heater does not start in heating mode nor
in ventilation, follow the steps below to identify the most
likely cause of the fault:
1.
Disconnect electrical power supply to the gas unit
heater.
2.
Check the fuse on the electrical terminal block. If it is
broken, replace it with a suitable one (see electrical da-
ta in Table 1.2
p. 13).
3.
Restore the electrical power supply.
4.
Check that the power supply is correct (230 V 1-N 50
Hz).
5.
Check static gas supply pressure with respect to values
in Table 3.1
p. 17.
6.
Switch on the gas unit heater via the remote control
(presence of the symbol on the display).
7.
Check that the blower starts. If the blower does not
start:
„ Check that the limit thermostat has not been trig-
gered. If this is the case, check the overheating
cause, remove it, and reset the limit thermostat
(procedure Paragraph 7.3
p. 42).
„ Check the presence of voltage at the blower. If the
voltage is present but the blower does not start,
disconnect blower control cable. If it still does not
start, replace the blower condenser. If this also does
not solve the problem, replace the blower itself.
8.
After 40 seconds from blower start, check the elec-
trodes for sparks. If the electrodes do not spark:
„
Check its position and the connection cable.
„
Check the ignition box fuse. If it is broken, replace
it.
„
If the fuse is intact but the electrodes do not spark,
replace the ignition transformer.
9.
If the burner starts but stops immediately after
sparking:
„
Check that the phase and the neutral of the power
supply are not reversed.
„
Check the position and integrity of the detection
electrode and, if necessary, replace it.
„
If the electrode and power supply are ok, replace
the ignition transformer.
10.
If the burner does not start or no gas flows from it:
„
Check gas supply.
„
If gas is being supplied, check the gas valve for
voltage during sparkling. If the correct voltage is
applied and the blower is running, check that the
nozzle is not obstructed. If the nozzle is free, re-
place the gas valve.
„
If the gas is still being supplied, but no voltage is
supplied to the gas valve, check the electrical con-
nections to the control board and, if correct, re-
place the control board.
11.
After the burner ignition, check gas supply pressure,
both static and dynamic, with respect to values in
Table 3.1 p. 17.
12.
Check that the fan starts (within 120 seconds from the
ignition of the burner):
„
If it does not start, check the correct operation of
the heat exchanger probe and, if necessary, replace
it.
„
Check the fan motor condenser and, if necessary,
replace it.
„
If this does still not solve the problem, replace the
fan motor.
7.5
PERIODS OF INACTIVITY
Should you foresee to leave the appliance inactive for a