Troubleshooting - Electra Delta 25 Service Manual

12

TROUBLESHOOTING

12.1 ELECTRICAL & CONTROL 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!!!
When turned off, the system is still charged (400V)!!!
Touching the controller before discharging may cause an electrical shock!!!
For safe handling of the controller please refer to section 12.3 below.
12.1.1 Single Split system failures and corrective actions
No SYMPTOM
Power supply indicator (Red
1
LED) does not light up.
Unit does not respond to
remote control message
2
Unit responds to remote
control message but Operate
3
indicator (Green LED) does
not light up
Indoor fan does not start
(louvers are opened and
Green LED does light up)
4
Indoor fan works when unit is
OFF, and indoor fan speed is
5
not changed by remote control
command.
6
Compressor does not start
Compressor stops during
7
operation and Green LED
remains on
Compressor is on but outdoor
8
fan does not work
Unit works in wrong mode
9
(cool instead of heat or heat
instead of cool)
All components are operating
10
properly but no cooling or no
heating
SM DELTAZ 1-E.0 GB
WARNING!!!
VOLTAGE!!!
It takes about 4 Min. to discharge the system.
PROBABLE CAUSE
No power supply
Remote control
message not reached
the indoor unit
Problem with display
PCB
Unit in heat mode and
coil is still not warm.
Problem with PCB or
capacitor
PCB problem
Electronics control
problem or protection
Electronic control or
power supply problem
Problem with outdoor
electronics or outdoor
fan
Electronics or power
connection to RV
Refrigerant leak
CONTENTS
TROUBLESHOOTING
CORRECTIVE ACTION
Check power supply. If power supply is OK,
check display and display wiring. if OK,
replace controller.
Check remote control batteries, if batteries
are OK, check display and display wiring, if
OK, replace display PCB.
If still not OK replace controller.
Replace display PCB.
If still not OK replace controller.
Change to cool mode and check.
Change to high speed and Check power
supply to motor is higher than 130VAC
(for triack controlled motor) or higher than
220VAC for fixed speed motors, if OK replace
capacitor, if not OK replace controller
Replace controller
Perform diagnostics (See 12.1.3 below), and
follow the actions described.
Perform diagnostics (See 12.1.3 below), and
follow the actions described.
Check outdoor fan motor according to the
procedure in section 12.2.3 below, if not OK
replace controller
Check RV power connections, if OK,
Check RV operation with direct 230VAC
power supply, if OK,
Replace outdoor controller.
Check refrigeration system.
12-1