Glow-worm Ultimate 3, Installation And Maintenance Instructions Manual

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Installation and maintenance instructions Ultimate 3 0020239568_03
Status code Meaning
S.20 Domestic hot water mode: Requirement
S.21 Domestic hot water mode: Fan prerun
S.22 Domestic hot water mode: Pump prerun
S.23 Domestic hot water mode: Burner ignition
S.24 DHW mode: Burner on
S.25 DHW mode: Pump/fan overrun
S.26 DHW mode: Fan overrun
S.27 DHW mode: Pump overrun
S.28 Domestic hot water mode: Temporary shutdown of the burner
Other displays
S.30 Room thermostat is blocking heating mode.
S.31 No heating demand: Summer mode, eBUS control, waiting period
S.32 Fan waiting time: Fan speed outside of the tolerance values
S.34 Frost protection active
S.39 Underfloor heating contact open
S.42 Flue non-return flap closed
S.46 Frost protection mode (Comfort): Minimum load
S.53 Product in waiting period/operating block function due to water deficiency (flow/return spread too large)
S.54 Waiting period: Water deficiency 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 demands blocked.
S.98 Automatic test programme: Return temperature sensor, heating demands blocked.
S.99 Internal automatic test programmes
S.108 Purging the combustion chamber, fan in operation
S.109 Product's standby mode activated
E Overview of fault codes
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/casing
F.11 Short circuit: Return temperature sensor NTC sensor defective, short circuit in the cable harness, cable/casing
F.12 and
F.91
Short circuit: Cylinder temperature
sensor NTC sensor defective, short circuit in the cable harness, cable/casing
F.13 Short circuit: Domestic hot water cylinder
temperature sensor NTC sensor defective, short circuit in the cable harness, cable/casing
F.20 Safety switch-off: Overheating temperat-
ure reached Incorrect earth connection between cable harness and product, flow or return
NTC defective (loose connection), black discharge via ignition cable, ignition
plug or ignition electrode
F.23 Safety switch-off: Temperature difference
too great (NTC1/NTC2) Pump blocked, insufficient pump output, air in product, flow and return NTC
sensors connected the wrong way round
F.24 Safety switch-off: Temperature rise too
fast Pump blocked, insufficient pump output, air in product, system pressure too
low, non-return valve blocked/incorrectly installed
F.25 Safety switch-off: Flue gas temperature
too high Break in plug connection for optional flue gas safety cut-out (STB), break in
cable harness
F.27 Safety switch-off: Fault in flame detection Moisture on the electronics, electronics (flame monitor) defective, gas solen-
oid valve leaking