Kaisai K2OC-18HFN32, Руководство по обслуживанию

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10.3.3.3 Voltage protection(ODU E5)
No
Yes
Check whether the voltage
of IPM board P and N is
normal? DC277-356V for
18-27KBtu/h; DC277-410V
for 36-42KBtu/h
No
Replace bridge rectifiers,
and then check whether the
system can run normally
Yes
Yes
No
Replace IPM board, and
then check whether the
system can run normally
Yes
No
Trouble is solved Replace outdoor main board
Check the voltage of
outdoor unit power supply,
whether the voltage
between L(L1) and N (L2) is
about 220~240VAC
Voltage protection
Check the power supply