Resetting The Error Indication (Red Led Lights); Notes On Fault Elimination - Nordmann AT4 Operating Instructions Manual

Warning
LED Display
Safety chain instable
–––
Warning
W38: Safety Loop Inst
Control signal instable
–––
Warning
W39: Control Instable
Limit humidity signal instable
–––
Warning
W40: Limit Instable
7.3

Resetting the error indication (red LED lights)

7.4

Notes on fault elimination

Error
LED Display
––– –––
––– –––
––– –––
To reset the error indication:
Disconnect the steam air humidifier from the mains. Wait approx. 5
seconds, then reconnect the unit to the mains.
Note: If the fault has not been eliminated, the error indication reappears
after a short while.
DANGER!
For the elimination of faults set the steam humidifier out of operation as
described in chapter 4.4, separate the unit from the mains and secure
it against inadvertent power-up.
The elimination of faults must be carried out by qualified and well trained
professionals only.
Malfunctions relating to the electrical installation (e.g. replacement of the
backup battery, replacement of fuses) must be repaired by authorized per­
sonnel or by your Nordmann representative's service technician only.
Repair work and the replacement of faulty components must be carried out
by your Nordmann representative's service technician only!
Cause
Safety chain opens and closes in short
intervals.
The signal at the control signal input
fluctuates strongly in short intervals.
The signal at the limit signal input fluctu-
ates strongly in short intervals.
Danger of electric hazard!
Remedy
Check/replace safety humidistat, ventilation
interlock and air flow monitor.
Check/replace humidity sensor or external
humidity controller.
Check/replace humidity sensor or external
humidity controller.
63