Appendix
0020239562_02 EASICOM 3 Installation and maintenance instructions 35
Status code Meaning
S.32 Fan waiting time: Fan speed outside of the tolerance values
S.33 Forced fan operation until the pressure monitor is switched
S.34 Frost protection active
S.39 Underfloor heating contact open
S.41 Water pressure too high
S.42 Flue non-return flap closed
S.46 Protection mode: Minimum load
S.53 Product in waiting period/operation block function due to low water pressure (flow/return spread too large)
S.54 Waiting period: Low water pressure in the circuit (flow/return spread too large)
S.88 Product purging active
S.91 Maintenance: Demo mode
S.96 Automatic test programme: Return temperature sensor, heating and hot water request blocked.
S.97 Automatic test programme: Water pressure sensor, heating and hot water request blocked.
S.98 Automatic test programme: Return temperature sensor, heating and hot water request blocked.
S.99 Automatic filling active
S.108 Purging the combustion chamber, fan in operation
S.109 Product's standby mode activated
D Overview of fault codes
Note
Since the code table is used for various products, some codes may not be visible for the product in question.
Fault code Meaning Possible cause
F.00 Fault: Flow temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not
plugged in correctly, interruption in cable harness, NTC sensor defective
F.01 Fault: Return temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not
plugged in correctly, interruption in cable harness, NTC sensor defective
F.10 Short circuit: Flow temperature sensor NTC sensor defective, short circuit in the cable harness, cable/housing
F.11 Short circuit: Return temperature sensor NTC sensor defective, short circuit in the cable harness, cable/housing
F.13 Short circuit: Domestic hot water cylinder
temperature sensor
NTC sensor defective, short circuit in the cable harness, cable/housing
F.20 Safety shutdown: Overheating temperat-
ure reached
Incorrect earth connection between cable harness and product, flow or return
NTC defective (loose connection), stray spark via ignition cable, ignition plug
or ignition electrode
F.22 Safety shutdown: Water deficiency in the
boiler
No or insufficient water in the product, water pressure sensor de-
fective, cable to the pump or to the water pressure sensor loose/not
connected/defective
F.23 Safety shutdown: Temperature spread
too great (NTC1/NTC2)
Pump blocked, insufficient pump output, air in product, flow and return NTC
connected the wrong way round
F.24 Safety shutdown: Temperature rise too
fast
Pump blocked, reduced pump output, air in product, system pressure too
low, non-return valve blocked/incorrectly installed
F.25 Safety shutdown: Flue gas temperature
too high
Break in plug connection for optional flue gas safety cut-out (SCO), break in
cable harness
F.27 Safety shutdown: Fault in flame detec-
tion
Moisture on the electronics, electronics (flame monitor) defective, gas solen-
oid valve leaking
F.28 Fault: Ignition unsuccessful when starting
up
Gas meter defective or gas pressure monitor has triggered, air in gas, gas
flow pressure too low, thermal isolator device (TAE) has triggered, incorrect
gas injector, incorrect spare gas valve assembly, fault on the gas valve as-
sembly, multiple plug on PCB incorrectly plugged in, break in cable harness,
ignition system (ignition transformer, ignition cable, ignition plug, ignition
electrode) defective, ionisation flow interrupted (cable, electrode), incorrect
earthing of product, electronics defective
F.29 Fault: Flame loss Gas supply temporarily stopped, flue gas recirculation, incorrect earthing of
product, ignition transformer has spark failure
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