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List of Failures (HMI-SG controller) (continuation)
Failure
Description
Heat pump -
blocked due to out-
door temperature
Heat pump
Humidification
Filters
Fan operat-
ing hours
Cooling
Heat recovery (an-
tifreeze protection)
Heat recovery
(rotary heat
exchanger)
Heat recovery
(rotary heat
exchanger)
Inlet relative
air humidity
Outdoor relative
air humidity
Room relative
air humidity
Air quality
(CO,CO2)
Back draught
protection (TH)
Flue-gas high
temperature,
heater shut down
Flue-gas high
temperature,
AHU shut down
Burner failure
Electric pre-heating
Electric pre-heating
Temperature
in the inlet
Heat exchanger
freezing
46
B
35
Informational notification - operation of the heat pump
is blocked due to outdoor temperature
B
36
Fault in the heat pump - contact issue
B
37
Humidifier fault - contact issue.
B
39
Filter clogging fault - contact issue
B
40
The set value of fan operating hours has been exceeded. The value of operat-
ing hours can be adjusted on the HMI-DM, TM, or HMI@Web controller.
B
41
Cooling fault (direct cooling, inverter condensing unit) - contact issue.
B
42
1) The control unit and the frequency inverter of the rotary heat exchanger are not com-
municating - internal error of the frequency inverter; incorrectly configured data points
of the frequency inverter (communication protocol, communication speed, parity, num-
ber of stop bits, communication delay); improperly connected data bus cable to the ter-
minals of the frequency inverter; missing termination resistor on the frequency inverter
2.) Active frost protection for the rotary heat exchanger (ROV) or heat recovery
unit (DEV) when the set temperature (data point 516) is below the threshold
B
43
Rotary heat exchanger belt / glycol pump
A
44
Clogging of the rotary heat exchanger wheel
B
46
Unconnected or damaged humidity supply sensor
B
47
Unconnected or damaged outdoor humidity sensor
B
48
Unconnected or damaged room humidity sensor
B
49
Unconnected or damaged air quality sensor
B
55
Fan backdraft protection for chamber cooling - ther-
mostat TH 167 or ES3M-T3 (gas heating)
B
56
Flue gas temperature > 220°C - heating shutdown
A
57
1) Unconnected or damaged flue gas temperature sensor
2) The flue gas temperature is higher than the set limit temperature (data point 472)
A
58
Internal burner malfunction - contact issue
A
59
Temperature behind the electric preheater < -50°C
B
59
1) Unconnected or damaged temperature sensor behind the electric preheater.
2) Fault in the electric preheater - thermostat
A
60
1) Unconnected or damaged supply air sensor
2) The supply air temperature is lower than the set temperature (data
point 442) - the frost protection of the water heating is activated
B
61
Unconnected or damaged temperature sensor be-
hind the rotary or plate heat exchanger
Failure Causes
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