Friedrich WallMaster WCVT12B30A Handleiding (90 Pagina's)

Handleiding

66 66

DIAG

CODE

PROBLEM

CONDITIONS POSSIBLE CAUSES CORRECTIVE ACTION

19

Inverter

immediate

fault 2

8212

Compressor Module

Over Current

1. Detect the fault when the

compressor is running;

2. The peak current of compressor

exceeds the set hardware limit

value.

3. If the above conditions are

met. the unit will shut down for 3

minutes, error will be reported.

1. AC power out of range.

2. System abnormal.

3. Wiring loose disconnected or in

wrong sequence.

4. PCB faulty.

5. Compressor damaged.

See ﬁgure 608

8206

Compressor Model

Conﬁguration

Error

Compressor code showed in display

is out of the setting ranges.

1. Power on the unit.

2. Compressor code showed in

display is out of the setting range.

Wrong compressor code Contact customer support.

20

Inverter

controlled

fault 1

7907

Modbus

Communications

Lost modbus

1. User Interface and Inverter PCB

power on.

2. Display Board cannot receive data

from PCB or received wrong data.

3. Communication errors between the

user interface and the inverter PCB.

4. If the above conditions are met 30s,

error will be reported.

1. Loose or disconnected wiring.

2. User Interface faulty.

3. Inverter PCB faulty.

1. Check for loose, damaged, or disconnected

wiring.

2. Replace User interface.

3. Replace Inverter PCB.

21

Inverter

controlled

fault 2

7913 Unit detects the HPS is open 1. System pressure exceeds the

HPS limits.

2. HPS switch circuit has failed.

1. Determine refrigeration system fault.

2. Check if switch has malfunctioned by

Checking for continuity with no system

pressure.

TROUBLESHOOTING

Diagnostic Codes-Inverter

Figure 604

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