Daikin Altherma EHYKOMB33AA - Reading out information

12 Troubleshooting
Installation and operation manual
35
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1H – 2018.10
8 Fill the condensate trap with water and fit it to the connection
below the condensate drain pan.
9 Slide the flue pipe, turning it counterclockwise, with the top
around the flue adapter into the top cover.
10 Insert the bottom into the condensate drain pan and tighten the
coupling nut clockwise.
11 Open the gas tap and check the gas connections below the gas
valve and on the mounting bracket for leakage.
12 Check the space heating and the water pipes for leakages.
13 Turn on the main power supply.
14 Turn on the appliance by pushing on the
button.
15 Check the front cover, the fan connection on the front cover and
the flue pipe components for leakage.
16 Check the gas/air adjustment.
17 Fit the casing, tighten the 2 screws on the left and right side of
the display.
18 Close the display cover.
19 Check the heating and hot water supply.
12 Troubleshooting
12.1 General guidelines
Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
12.2 Precautions when troubleshooting
WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
12.3 Solving problems based on
symptoms
12.3.1 Symptom: The burner does NOT ignite
Possible causes Corrective action
Gas tap is closed. Open the gas tap.
Air in the gas tap. Remove air from the gas pipe.
Gas supply pressure too low. Contact the gas supply company.
No ignition. Replace the ignition electrode.
No spark. Ignition unit on gas
valve faulty.
▪ Check the cabling.
▪ Check the spark plug cap.
▪ Replace the ignition unit.
Gas/air adjustment NOT correctly
set.
Check the adjustment. See "To
check the carbon dioxide
setting"on page29.
Fan faulty. ▪ Check the wiring.
▪ Check the fuse. If necessary,
replace the fan.
Fan dirty. Clean the fan.
Gas valve faulty. ▪ Replace the gas valve.
▪ Re-adjust the gas valve, see
"To check the carbon dioxide
setting"on page29.
12.3.2 Symptom: The burner ignites noisily
Possible causes Corrective action
Gas supply pressure too high. The house pressure switch may
be faulty. Contact the gas
company.
Incorrect ignition gap. ▪ Replace the ignition pin.
▪ Check the ignition electrode
gap.
Gas/air adjustment NOT correctly
set.
Check the setting. See "To check
the carbon dioxide setting"on
page29.
Weak spark. Check the ignition gap.
Replace the ignition electrode.
Replace the ignition unit on the
gas valve.
28.3~30.2 mm
a
a Spark gap (±4.5mm)