DanVex DD Series - Page 30

Page 30 of 39
Failure symptoms
Troubleshooting steps recommended
No dehumidification. Machine is not in
operation.
The fan and compressor are
not running, and the
controller is not
power on.
1. The device is not plugged in, or there is no power
supply to the power outlet
2.
The controller is damaged or faulty
3.
Internal or control wiring is not well connected
4.
3 Phase Protector is faulty
or incoming 3 phase
sequence is incorrect.
5.
Voltage failure.
6.
Low Pressure Switch Activated. Possible of Gas
leakages.
Please check the gas pressure with a
refrigerant gauge manifold. If the gas pressure is
low, please check the welded point on the Heat
Exchanger and the copper tube to find the
leakage
point.
No dehumidification. When the initial
dehumidification ventilation control is
turned off, the compressor is not running
but the fan is running.
1. Controller No.10 pin no power output (please
refer 3.15 Machine Picture diagram)
2.
The compressor electric circuit is damaged
3.
Poor connection in compressor circuit
4.
Possibility of capacitor faulty
5.
Possibility of compressor is overloaded
6. Possibility of compressor is damaged
The fan does not rotate when the
ventilation function is activate
d.
With the
humidity control device turned on, the
compressor runs for a short time, and
then frequently starts and stops, and
eventually the compressor does not run.
1. There are obstacles preventing the fan from
rotating.
2.
Check the Controller Pin No.2
whether there is any
DC Voltage output of 0 – 10V.
3.
Check if the Controller Pin No. 1 (com) is properly
connected.
4.
If after checking the controller there is no DC
output, please replace with a new controller.
5.
The fan
bearing wear off, causing the fan doesn’t
rotate.
6.
The
fan does not run leading to voltage protection
7. Possibility of fan faulty
Evaporator coils continue to frost and
have low dehumidification capacity.
1. Refrigerant shortage, possible of leakages.
2.
The air filter (s) is too dirty causing insuffici
ent of
airflow
. Or duct connection is not properly done,
causing insufficient of airflow passing through the
dehumidifier.
3. Filter Drier is blocked, require to replace