Nortec ME Control - Manual (Page 63)

63 Fault elimination
7.2 Malfunction list
Important! Most operational malfunctions are not caused by faulty equipment but rather by improper
installation or disregarding of planning guidelines. Therefore, a complete fault diagnosis always involves
a thorough examination of the entire system. Often, the installation of the evaporative module has not
been properly executed, or the fault lies with the humidity/temperature control system.
Code Message Information
Warning Fault Possible causes Remedy
––– E18 Air Temp Snsr Nortec ME Control stopped operation as the incoming temperature signal of the
optional anti freeze protection has failed.
Note: If – at any time – the temperature signal reading is correct again, the system
will continue with normal operation.
Sensor wiring broken or sensor defective Check wiring, replace sensor if necessary
Sensor not connected
Correctly connect sensor to driver board
––– E19 Freeze Prot The ME stopped operating as the temperature of the incoming air fell below the
preset limit of the optional anti freeze protection.
Note: If – at any time – the air temperature of the incoming air rises above the limit
value again, the system will continue with normal operation.
Temperature too low for safe operation
of the Nortec ME Control
No remedy
Temperature limit set wrong Contact your Nortec representative.
W20 E20 Safety Chain The Nortec ME Control stopped operating as an external device opened the safety
chain. E.g. ventilation Interlock, safety humidistat, etc..
Note: If – at any time – the safety chain is closed again, the system will continue
with normal operation.
Note: depending on
the configuration
either Warning or
Fault is indicated
Ventilation interlock open. If applicable, check/turn on
ventilation system.
Air flow monitor triggered. Check ventilator/filter of the
ventilation system.
Safety humidistat triggered. Wait. If applicable, check
safety humidistat
W21 ––– High Water Water overflow detected. Current operation status not affected.
Note: If – at any time – the normal operating water level is reached, the system will
continue with normal operation.
Inlet solenoid valve blocked in open
position or defective.
Check/replace inlet solenoid valve.
Gravity drain solenoid valve blocked in
closed position.
Check/replace gravity drain solenoid
valve.
Drain piping/drain trap clogged. Check/Clean drain piping and drain trap.
Backpressure in drain trap. Check drain trap venting to duct.
Assisted drain function not activated. Contact your Nortec representative.