Lack Of Phase Diagnosis And Solution - York YEFE BZTM-MOW1 Series Service Manual

5.9

Lack of Phase diagnosis and solution

Description: Outdoor PCB detects the voltage of one or two phase are very low.
Recommended parts to prepare:
• Problems of 3-phase power supply
• Wiring mistake of 3-phase power supply
• Faulty outdoor PCB
Troubleshooting and repair:
Lack of phase
Lack of phase
C heck the pow er suppl y
C heck the pow er suppl y
i s i t 3 phase, 220-230V ?
i s i t 3 phase, 220-230V ?
Y ES
C heck the connecti on betw een pow er suppl y
C heck the connecti on betw een pow er suppl y
and term i nal
and term i nal
I s the vol tage i n outdoor term i nal i s 3
I s the vol tage i n outdoor term i nal i s 3
phase, 220-230V ?
phase, 220-230V ?
Y ES
Repl ace the outdoor m ai n PC B
Repl ace the outdoor m ai n PC B
Restart the uni t w hen the pow er
Restart the uni t w hen the pow er
N O
suppl y returns to norm al
suppl y returns to norm al
i s the pow er w i ri ng
i s the pow er w i ri ng
N O
w i red correctl y?
w i red correctl y?
Y ES
N O Reconnect the pow er w i ri ng
Reconnect the pow er w i ri ng
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