Dantherm CDP 85 - Page 25

Fault nding guide: Fault nding
en
Display text
Type Fault Unit behaviour Possible cause Fault nding Solution(s)
LP Error Alarm LP
Error
No or limited condensate draining from dehumid- ier LP Error can be periodical- ly present
Low ambient tempera- ture and/or humidity can result in limited conden- sation of water
Conrm compressor is running Conrm fan is running Conrm solenoid valve is closed (no hissing sound from valve)
Wait for room tem- perature/humidity to increase
Solenoid valve leak Hissing from solenoid valve
Voltage at solenoid valve coil when there is no ice on evaporator coil
Excercise valve by means of external magnet or by applying 230VAC to valve coil Replace solenoid valve
Precondition of refriger- ant leak or TEV failure
See above See above
HP Error Alarm HP
Error
Periodic HP Error Unit seemingly operating normally, fault condition will disappear Persistant HP Error Unit blocked for restart
Fan failure Restart unit
Verify fan is working. If fan switches o for no apparent reason it can be caused by the internal overload protection
Replace fan
Air inlet/outlet clogged Coil(s) clogged
Verify dampers are open (if installed) Verify if inlet and/or outlet are clogged/restrained Verify if coils are clogged
Unrestrict inlet/outlet
HP temperature sensor fault
Verify temperature sensor resistance (ohm) Replace temperature
sensor
Condenser coil clogged Inspect condensor coil ns for dust/debris. Clean condenser coil
*Measure the resistance between the two wires coming from the NTC temperature sensor. Resistance should be within the range from 190kΩ - 0,14kΩ corresponding to -50..98°C
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