E2 (Zero Crossing Detection Error Diagnosis And Solution) - Bosch CLIMATE 5000 Service Manual

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.
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:
Check the connections and power
46
supply.
Is it normal? NO
YES
Indoor main PCB is defective.
Replace indoor main PCB.
Fig. 70.
Correct the connections. Turn on the unit when the
power supply is good.
CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)