Delta PG-35 User Manual download pdf (Page 44)

12-1

TROUBLESHOOTING

SM DELTAZ 1-E.0 GB

12 TROUBLESHOOTING

12.1 ELECTRICAL & CONTROL TROUBLESHOOTING

WARNING!!!

When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH

VOLTAGE!!!

Never open the Outdoor unit before turning off the Power!!!

When turned off, the system is still charged (400V)!!!

It takes about 4 Min. to discharge the system.

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 PROBABLE CAUSE CORRECTIVE ACTION

Power supply indicator (Red

LED) does not light up.

No power supply

Check power supply. If power supply is OK,

check display and display wiring. if OK,

replace controller.

Unit does not respond to

remote control message

Remote control

message not reached

the indoor unit

Check remote control batteries, if batteries

are OK, check display and display wiring, if

OK, replace display PCB.

If still not OK replace controller.

Unit responds to remote

control message but Operate

indicator (Green LED) does

not light up

Problem with display

PCB

Replace display PCB.

If still not OK replace controller.

Indoor fan does not start

(louvers are opened and

Green LED does light up)

Unit in heat mode and

coil is still not warm.

Change to cool mode and check.

Problem with PCB or

capacitor

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

Indoor fan works when unit is

OFF, and indoor fan speed is

not changed by remote control

command.

PCB problem Replace controller

Compressor does not start

Electronics control

problem or protection

Perform diagnostics (See 12.1.3 below), and

follow the actions described.

Compressor stops during

operation and Green LED

remains on

Electronic control or

power supply problem

Perform diagnostics (See 12.1.3 below), and

follow the actions described.

Compressor is on but outdoor

fan does not work

Problem with outdoor

electronics or outdoor

fan

Check outdoor fan motor according to the

procedure in section 12.2.3 below, if not OK

replace controller

Unit works in wrong mode

(cool instead of heat or heat

instead of cool)

Electronics or power

connection to RV

Check RV power connections, if OK,

Check RV operation with direct 230VAC

power supply, if OK,

Replace outdoor controller.

All components are operating

properly but no cooling or no

heating

Refrigerant leak Check refrigeration system.

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