Maico WS 170 L Betriebs- Und Wartungsanleitung Seite 36

uk │ 7. Faults, messages
Fault on Possible cause
RLS 1 WR
Fans not Temperature sensor
operating. failed (not connected,
Fault message: cable break or short-
All 3 LEDs on the circuit).
RLS 1 WR flash.
The fault A temperature
message appears < 5 °C is measured on
immediately and the supply air
goes out after temperature sensor
approx. 1 minute. (optional).
Fans not Differential pressure
operating. controller has triggered.
No fault
message:
All 3 LEDs on
the RLS 1 WR
are off.
Door contact switch not
actuated (e.g. with front
cover open) or defective.
System is de-energised.
34
Check
Check connection.
Check temperature
sensor (at 20°, the
resistance is approx.
12 kOhm).
Check shutter of air
channels and heat
exchanger for ice.
Check differential
pressure controller.
Establish cause of
trigger. If the differential
pressure controller was
triggered, terminals N
and on circuit board
A2 are not connected
electrically.
Check the function of the
door contact switch.
Check fuse and mains
cable.
Rectification
Correctly connect
temperature sensor.
Replace temperature
sensor if necessary.
Clean the air channels.
De-ice the heat
exchanger and increase
EF and AF switching
points using jumper,
 Chapter 6.7.3 of the
Installation instructions.
Take fireplace out of
operation.
Replace differential
pressure controller.
Fit front cover. Replace
defective door contact
switch.
Activate fuse.