Refrigerant Flow - DeLonghi GWHD18A1NK3EA Service Manual

Cycle Parts
Trouble analysis
Breaker tripped or fuse
burnt out
Both indoor unit and
outdoor unit can't
start up
Is the setting temp. suitable?
Is COOL(HEAT) load suitable?
Malfunction of

refrigerant flow

Short of air volume
Outdoor unit installation place is
improper
When set the breaker to ON, it will
trip off at once.
When turn on the unit, the breaker
will trip in a few minutes
No power supply
The power plug is not connected
well or poor connected.
Wrong wire connection between the
indoor unit and outdoor unit.
Malfunction of wireless remote control
Fuse of controller was burnt out
Whether the wire connection between strong
current board and light current board of the contr-
oller is firmed ?
Is the transformer output wire
connected well, is there voltage output?
Adjust the setting temp.
To check the pretested COOL(HEAT)load
Malfunction of 4-way valve
Short of refrigerant volume
Malfunction of compressor
Short of valve gate flow volume
Air filter were blocked
Fan speed was set too slow
Outdoor unit should be install in a place with well
ventilation, and should be installed the awning.
Troubleshooting Guide
Test the insulative resistance for
earthing, to confirm whether unit
is current leakage or not
Check the breaker and test
the resistance.
Check the circuit
Check and insert the plug tightly
According to the electric diagram to
check the wire and connect correctly
Check the wireless remote control
Replace the fuse of controller
Please fix the connection wire firmly
Please fix connection wire firmly,
check output voltage
Replace the 4-way valve
Charge the refrigerant
Replace the compressor
To open the valve gate adequately
Clean the filter
To set the fan speed to high or
middle speed
Service Manual 50