Maico WS 470 Series Operating Instructions Manual page 64

UK | 18 Faults
18.3 Fault messages
The tables below show potential faults and
their causes.
Column 3 "Ackn." states whether the fault has
to be acknowledged after rectification or not.
M: Fault rectification must be acknowledged
manually. Only then is the ventilation unit
operable again.
A: Rectification of a temperature sensor
fault is detected by the control. Once rectified,
the ventilation unit continues running auto-
matically.
Collective alarm: A collective alarm is also
issued with every fault message. The collec-
tive alarm can be used via the potential-free
switching contact on the main board and, in
case of malfunction, switch on a signal lamp,
for example.
64
Fault / Message
Failure of Possible cause
Supply air Supply air fan fault
fan
Break in a cable,
fan defective
Exhaust air Exhaust air fan
fan fault
Break in a cable,
fan defective
Communication Communication
with main with
control unit main control unit
(comfort control fault
unit)
Break in a cable;
main control unit
defective; wiring
incorrect
Sensor Temperature
T-outside air, sensor, upstream
upstream of of EHE, fault
EHE
Break in a cable;
temperature
outside measuring
range
Unit Unit inlet tempera-
T-air inlet ture sensor fault
sensor
Break in a cable;
temperature outside
measuring range
Sensor Outgoing air tem-
T-outgoing air perature sensor
fault
Break in a cable;
temperature outside
measuring range
Sensor Supply air temper-
T-supply air ature sensor fault
Break in a cable;
temperature outside
measuring range
Sensor External room
T-room external temp. sensor fault
Break in a cable;
temperature outside
measuring range
Ackn.
M
M
A
A
A
A
A
A