Troubleshooting - Electra DELTA 22 Service Manual

12.

TROUBLESHOOTING

When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH
Never open the Outdoor unit before turning off the Power!!!
Touching the controller before discharging may cause an electrical shock!!!
For safe handling of the controller please refer to section 1.6 below.
1.1 Dual Split System Failures and Corrective Actions
No SYMPTOM
1 Power supply indicator at
indoor unit (Red LED) does
not light up.
2 Indoor fan does not start
(louvers are opened and
Green LED does light up)
3 Compressor does not start
4 One indoor is operating, in
cool mode, with no
capacity, and the other unit
has water leaks/freezing
problems
5 One indoor is operating in
heat mode with a limited
capacity, and the coil on
the other unit is very hot.
6 Compressor operate but
unit generate no capacity
7 One unit only is operating
8 All others
SM DUO38 1-E.1 GB
WARNING!!!
VOLTAGE!!!
When turned off, the system is still charged (400V)!!!
It takes about 3 Min. to discharge the system.
PROBABLE CAUSE
No power supply
Unit in heat mode
and coil is still not
warm.
The outdoor unit is in
the opposite mode.
Problem with PCB or
capacitor
Jumper settings of
outdoor unit is not
correct
The communication
wires of the two
indoor units are
switched
EEV is stuck in close
position
Communication
problems
Specific problems of
indoor or outdoor
units
CONTENT
TROUBLESHOOTING
CORRECTIVE ACTION
Check power supply from the outdoor. If
power supply is OK, check display and
display wiring. If OK, replace controller.
Change to cool mode and check.
Change operation mode and check if fan
starts.
Change to high speed and Check power
supply to motor is higher than 130VAC
(for Triac controlled motor) or higher
than 220VAC for fixed speed motors, if
OK replace capacitor, if not OK replace
controller
Use diagnostics (see 1.2 below)
information on MSMP board.
Check and correct the communication
wires connection
Check EEV
Use diagnostics information on MSMP
board (see 1.2 below).
Use diagnostics information on MSMP
board (see 1.2 below), and perform
action items as recommended in single
split systems
12-1