Electra DCI 80, Service Manual

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