HiDew DOS - 5 AFTER-SALES; 5.1 Troubleshooting

rev08- Installation, use and maintenance manual
DDS-DCS-DVS-DOS - Dehumidifiers for small swimming pools
30 - 60
5 AFTER-SALES
5.1 TROUBLESHOOTING
On the next pages you will find a list of the most common reasons that may cause the unit to block or, at least, malfunction. They
are listed according to the easily identifiable symptoms.
Pay the utmost attention in the execution of the suggested operations for resolution of the various
problems: excessive lack of attention can cause serious injuries. We recommend contacting the
manufacturer or a qualified technician after having identified the cause.
NR
FAULT
ANALYSIS OF POSSIBLE CAUSES
CORRECTIVE ACTIONS
1
The unit does not start
No electrical power supply to the unit
Check its presence on the power supply terminals
No power supply to the electronic board
Check its presence on the terminal boards
There are alarms present
Check the presence of alarms on the terminal,
eliminate the causes and restart the unit.
Phase sequence relay cut-out
(only models 210, 230 and 300)
Check if the sequence of phases is correct
(refer to paragraph
“Electrical connections on the panel”)
2
The compressor does not
start
Intervention of the internal thermo-
protector
Unplug the unit, wait for the compressor to cool down
and check to see if it restarts by reconnecting the
power supply.
Identify the cause of the intervention and eliminate it
High-pressure protection on the
refrigerant circuit
Make reference to anomaly 3
The humidity set value does not allow it
to be turned on
Set a different humidity set value
Low ambient temperature
Heat the room above 12°C or above 5°C only if there is
an optional hot gas defrost
3
High pressure
Air flow is inadequate
Check the cleanliness of the filters, heat exchange coils
and recovery unit
Check that all the fans are turning correctly.
Check the length and the number of curves of the
channels and if the unit does not have electronic fans
reduce their length and number, if it is mounted
increase the fan speed (refer to the paragraph
"Calibration of the flow rate for units with electronic
fan")
Other causes
Call a specialised technician
4
Low pressure
Ice has formed on the evaporating coil
If there is ice on the evaporating coil, temporarily
switch off the unit and melt all the ice present
Other causes
Call a specialised technician
5
Electric heating element
overheating
Air flow is inadequate
Check the cleanliness of the filters, heat exchange coils
and recovery unit
Check that all the fans are turning correctly.
Check the length and the number of curves of the
channels and if the unit does not have electronic fans
reduce their length and number, if it is mounted
increase the fan speed (refer to the paragraph
"Calibration of the flow rate for units with electronic
fan")
Other causes
Call a specialised technician
6
Discharge machine alarm
Loss of refrigerant gas
Call a specialised technician