Electra WNG 50 DCI Service Manual page 88

TROUBLESHOOTING
No SYMPTOM
One indoor unit or more are
operating in cool mode with no
7.
capacity, and the other units have
water leaks/freezing problems
One indoor or more are operating in
heat mode with a limited capacity,
8.
and the coil on the other units are
very hot.
Outdoor unit display board and leds
9
are off
Compressor operates but one or
10.
more units generates no capacity
Compressor is over heated and unit
11.
does not generate capacity
12. Compressor stops during operation
13. Not all units are operating
14. Compressor does not start
Unit works in wrong mode (cool
15. instead of heat or heat instead of
cool)
All components are operating
16.
properly but no cooling or no heating
Compressor motor is generating
17.
noise and no suction occurs
Freezing of outdoor unit in heat mode
18. and outdoor unit base is blocked with
ice
The unit stop suddenly during
19.
operation
Indoor unit(s) Indicator(s) leds may
20.
flicker
Other home appliances operation is
faulty such as noise appears in the
21. television picture, or the picture is
distorted or static occurs in the radio
sound
22 All others
14-2
PROBABLE CAUSE
The communication wires
of the indoor units are
switched
No power supply
PFC Chock coil
Burnt fuse
EEV problem
Refrigerant leakage
Indoor coil block
Outdoor coil block
EEV problem
Refrigerant leakage
Indoor coil block
Outdoor coil block
Electronic control
Refrigerant leakage
Communication problems
Electronics control
problem or protection
Electronics or RV problem
Refrigerant leak
Phase order to
compressor is wrong
EMC interference to the
A/C unit
EMC interference by the
A/C unit
Specific problems of
indoor or outdoor units
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
CONTENT
CORRECTIVE ACTION
Check and correct the
communication wires
connection
Check the connections and the
wiring on the main terminal -
Repair if needed.
Check the PFC Chock coil
( 2.4.3)
Check 20A fuse on the Filter
( 2.4.2)
Check EEV ( 2.4.7)
Check refrigeration system
( 2.2)
Clean filters and/or remove
block
Remove block and/or avoid air
by-pass
Check EEV ( 2.4.7)
Check refrigeration system
( 2.2)
Clean filters and/or remove
block
Remove block and/or avoid air
by-pass
Check diagnostics (see 2.3
below)
Check refrigeration system
( 2.2)
Check diagnostics (see 2.3
below)
Check RV ( 2.4.6)
Check refrigeration system
( 2.2)
Check compressor phase
order
Connect base heater
Check for EMC problems
( 2.4.10.1)
Check for EMC problems
( 2.4.10.2)
Check diagnostics (see 2.3
below)