Immergas MYTHOS HP - Troubleshooting and Gas Valve Calibration

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3.6 TROUBLESHOOTING
Maintenance operations must be carried out by an au-
thorised company (e.g. Authorised Technical Assistan-
ce Service).
Trouble Possible causes Solutions
Smell of gas
Caused by leakage from gas circuit pipeli-
nes.
Check sealing eciency of gas intake circuit.
Repeated ignition blocks No gas. Condensate drain clogged.
Check the presence of pressure in the network and that the gas adduction
cock is open. Restore/release the function of the condensate drain,
checking that the condensate has not aected: combustion components,
fan and gas valve. Check the function of the condensate sensor.
Irregular combustion or
noisiness
Dirty burner, clogged primary heat
exchanger, incorrect combustion parame-
ters, intake-exhaust terminal not correctly
installed.
Check the indicated components.
Frequent trips of the
overheating safety device
thermostat function.
Lack of water in the boiler, poor water cir-
culation in the system or blocked circula-
ting pump (Par. 1.27).
Check on the pressure gauge that the system pressure is within establi-
shed limits. Check that the radiator valves are not closed and also the fun-
ctionality of the pump.
Siphon blocked
Dirt or combustion products deposited in-
side.
Check that there are no residues of material blocking the ow of conden-
sate.
Condensing heat
exchanger clogged
Siphon and/or duct between condensing
exchanger and siphon clogging.
Check that there are no residues of material blocking the ow of conden-
sate.
Poor production of
D.H.W.
DHW heat exchanger clogged.
Contact Immergas Aer-Sales Assistance Service that has procedures to
clean the D.H.W. heat exchanger.
Red pump LED
Low power supply voltage (when the mini-
mum voltage is reached aer about 2 se-
conds, the LED switches from green to red
and the pump stops).
Wait for the power supply voltage to rise; when the pump restarts, the LED
will turn green again with a delay of about one second. Note: e ow rate
decreases as the supply voltage decreases.
Rotor locked (Powering the pump with the
rotor seized, aer about 4 seconds the LED
switches from green to red.
Carefully act on the screw in the middle of the head to manually release
the cranksha; circulation starts up immediately aer the rotor is relea-
sed and the LED switches from red to green aer about 10 seconds.
Electrical error. Check that there is no fault on the pump (on its wiring or electronics).