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SchwankAir Controller
Table - Alarm
A1
Motor alarm
Thermal contact has
deployed. One or more
motors are overheated.
Check that nothing is obstructing the unit’s air intake and exhaust.
When the overheated motor has cooled the thermal switch shuts
again and the alarm can be reset. At repeated alarms, check the
motors, replace damaged motors.
Missing link on motor protection
on Air Curtain PCB.
For units having built-in thermal protection but without external
connection, the motor protection terminals must be linked.
Unit won’t start.
For units having built-in thermal protection but without external
connection, the motor protection terminals must be linked.
¯
Unit only starts on high speed.
Check motor and transformer connection terminal on the Air Curtain
PCB-pc board.
Error code
Cause
Action
A2
Over heating
alarm
The temperature in the unit
has exceeded the alarm limit
for overheating.
[Only units with internal
temperature sensor]
Check that nothing is obstructing the unit’s air intake and exhaust.
Check function of the contactors [E], Check function of actuator
and valve, flow temperature and bypass settings [W].
Check internal temperature sensor, measure
resistance, 47kOhm at 25°C.
A3
Frost protection
alarm
The temperature in the unit
has fallen below the alarm
limit for frost protection [only
water heated units with internal
temperature sensor and/
or return water temperature
Check the function of the actuator, valve and bypass settings.
Check the temperature and flow of the hot water supply.
In event of an alarm there is a risk that the coil is damaged, check
carefully for leakage and replace the water heating coil if damaged.
A4
Filter alarm
Fixed run time before filter alarm
has been reached.
Replace or clean the filter, if neccessary adjust the fixed time based
on how dirty the filter was and reset the alarm.
The external filter guard has
been activated.
Replace or clean the filter, if neccessary adjust settings of the filter
guard based on how dirty the filter was and
reset the alarm.
A5
External alarm
External alarm input
[terminal 9-10]
Check the external alarm.