Bosch Climate 5000 - E2 (Zero Crossing Detection Error Diagnosis and Solution)

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46 CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)

Troubleshooting

Remarks:

• Use a multimeter to test the resistance of the reactor which does not

connect with capacitor.

• The normal value should be around zero ohm. Otherwise, the reac-

tor may have malfunction.

Fig. 70.

5.5.4 E2 (Zero crossing detection error diagnosis and solution)

Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.

Possible defects:

• Connection mistake

• Faulty PCB

Troubleshooting and repair:

YES

Check the connections and power

supply.

Indoor main PCB is defective.

Replace indoor main PCB.

Correct the connections. Turn on the unit when the

power supply is good.

Is it normal?

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