Electra DNG 18 - Troubleshooting

14-1
TROUBLESHOOTING
Revision Y05-01Service Manual - DNG Series
14. TROUBLESHOOTING
ELECTRICAL & CONTROL TROUBLESHOOTING
ATTENTION: check for broken or loose cable lugs first.
NO SYMPTON PROBABLE CAUSE CORRECTIVE ACTION
1. The stand-by indicator
(red led) on the central
control display panel
doesn’t light up.
There is no correct voltage
between the line and neutral
terminals on main P.C.B.
-If the voltage is low repair power
supply.
-If there is no voltage repair general
wiring.
-If there is correct voltage replace
main or display P.C.B’S
2. The operation indicator
(green led) on the
central control display
panel does not light up.
The remote control batteries
are discharged
-Replace batteries of the remote
control
3. The operation indicator
(green led) does not
light up when starting
from unit.
Check main P.C.B and
display P.C.B.
-Replace P.C.B if necessary.
4. The indoor fan does
not function correctly.
Check the voltage between
indoor fan terminals on the
main P.C.B.
- If there is voltage replace capacitor
or motor.
5. The outdoor fan does
not function correctly.
Check the voltage between
outdoor fan terminals on the
main P.C.B.
There is voltage between
outdoor fan terminals on the
outdoor unit.
There is no voltage between
outdoor fan terminals on the
outdoor unit.
- If there is no voltage replace main
P.C.B
- Replace capacitor or motor.
- Check and repair electrical wiring
between indoor and outdoor units.
6. The compressor does
not start up.
Check voltage on
compressor terminals on
the outdoor unit. (with
ammeter)
Check if there is correct
voltage between
compressor terminals on
the outdoor unit.
-If no voltage replace main P.C.B.
- If low voltage repair power supply.
-If the voltage correct replace
capacitor or compressor.
-If there is no voltage repair electrical
wiring between indoor and outdoor
units.
7. The refrigeration
system does not
function correctly.
Check for leaks or
restrictions, with ammeter,
pressure gauge or surface
thermometer.
- Repair refrigeration system and
charge refrigerant if necessary.
8. No cooling or heating
only indoor fan works.
Outdoor fan motor faulty or
other fault caused,
compressor overload
protection cut out.
-Replace P.C.B.
- Outdoor fan blocked remove
obstructions.
CONTENT