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UAB KOMFOVENT we reserve the right to make changes without prior notice
C5.1-20-05
18
Code Message Possible cause Elimination
16B-18B, 28A-30A Compressor failure
No power supply.
Check supply voltage on the circuit
breaker and/or make sure whether
it is on.
Supply voltage mismatches.
Check that the supply voltage is on all
three phases, if necessary, swap the
two phase conductor positions.
Compressor motor failure.
Check the compressor motor and
replace it if necessary.
Compressor drive failure.
Check the operation of the compressor
drive and replace it if necessary.
99A Supply fan drive failure
A fault signal has been received from
the supply fan drive.
Check the supply fan drive and its
messages.
100A
Supply fan drive
overload
The supply fan drive is overloaded.
Check the condition of the supply fan
drive and its cooling.
101A Supply fan motor failure The supply fan is broken.
Check the supply fan and replace it if
necessary.
102A, 103A
Supply fan motor
overload
The supply fan is overloaded.
Check the condition of the supply fan
and make sure that the resistance of
the ventilation system is not exceeded.
104A Exhaust fan drive failure
A fault signal has been received from
exhaust fan drive.
Check the exhaust fan drive and its
messages.
105A
Exhaust fan drive
overload
The exhaust fan drive is overloaded.
Check the condition of the exhaust fan
drive and its cooling.
106A
Exhaust fan motor
failure
The exhaust fan is broken.
Check the exhaust fan and replace it
if necessary.
107A, 108A
Exhaust fan motor
overload
The exhaust fan is overloaded.
Check the condition of the exhaust fan
and make sure that the resistance of
the ventilation system is not exceeded.
109A Rotor drive failure
A fault signal has been received from
the rotor drive.
Check the rotor drive and its mes-
sages.
110A Rotor drive overload The rotor drive is overloaded.
Check the condition of the rotor drive
and its cooling.
111A Rotor motor failure The rotor motor is broken.
Check the rotor motor and replace it if
necessary.
112A, 113A Rotor motor overload The rotor motor is overloaded.
Check the condition of the rotor motor
and make sure that the rotor is not
blocked.
114A-124A Communication error
No communication with the internal
components of the air handling unit
(controller extension modules, fre-
quency converters, fans, etc.) or one /
several of them are broken.
Check internal connections and func-
tioning of separate components.
125A, 127A Controller failure Main controller module fault. Replace the main controller.
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