Fault Finding - Dehutech DT-3500 Technical Manual

Fault finding

Malfunction
None, or reduced
dehumidification capacity
Circuit breaker or fuse faulty
Dehumidifier does not start
Rotor does not rotate
No dry- or wet air volume
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Possible cause of trouble
Filter clogged
Electrical heater faulty
Airflow reduced
No rotation of rotor
Internal leakage in unit
Altered air volumes
Altered reactivation temperature
Air leakage
Fan faulty
Too large air volume
Rotor does not rotate
Reactivation heater faulty
No control circuit
Faulty control signal
Phase fault
Fuse for controls faulty
Drive belt is slipping
Drive belt broken or worn
Rotor jammed
Drive motor faulty
Filter clogged
Fan faulty
Phase fault
Ducts blocked
Corrective action
Clean or replace filters
Check fuses
Check openings and dampers
Check belt tensioning
Check sealings and springs
Measure and check air volumes
Check reactivation heater
Check panels and check seals
Check fans and motors
Check air volumes and dampers
Check drive motor and drive belt
Check reactivation heater
Check control fuses
Check external start/stop signal
Check main fuses and phase sequence
Check electrical components
Check belt tensioning
Replace drive belt
Check centre shaft, rim of rotor
Replace complete gear motor
Clean or replace filters
Check fan, motor and impeller
Check main fuses and phase sequence
Check dampers and ducts
DT-3500 - 11