Carrier Zephyr 30s - Fault codes

[roscosicecream]

Hi Everyone,
My Carrier Unit is a Zephyr 30s. The compressor will not kick in on drive mode & displays errors A05, 06, 08,09 & 011. When I run it on standby the 240volt compressor (seperate to the drive compressor) starts for about 5 mins then kicks out & an A03 error is displayed. It is not low on ***** & just had a drive compressor replaced about 6mths ago, which worked perfectly until now.
I am from Australia & have been told it could be a microprocessor.
Cheers
Steve

[abbsnowman]

Malfunction
Codes Description

A00

Red LED flashes
No malfunction.
Unit in operation.

A01 Low pressure switch

A02 High pressure safety switch

A03 Electric motor overload
protection on start-up

A04 Road operation clutch

A05 Standby clutch and contactor

A06 Condenser fan control

A07 Evaporator fan 1 control

A08 Heating option command

A09 Defrost valve control

A10 Quench valve control

A11 Heating valve control

A12 High temperature alarm

A13 Low temperature alarm

A14 Defrost alarm > 45 minutes

A15

Setpoint is out of controller
temperature range.

I would confirm transformer output DC voltage and plugs at Micro.

[intelligence]

hello. i thing it might be the microprocessor (not cab comand) the logic boar is mounted near by the condenser unit inside the electrical board. when apears many alarms. normaly it's a faulty microprocessor.

[moggy66]

Check the Stand-By realyon the micro might be stuck closed as your getting Stand-By codes on road operation