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18.3.3.3 Voltage protection(ODU E5)
Voltage protection
Check the voltage of
outdoor unit power supply,
whether the voltage
between L(L1) and N (L2) is
about 220~240VAC
Check the power supply
Check whether the voltage
of IPM board P and N is
normal? DC277-356V for
18-27KBtu/h; DC277-410V
for 36-42KBtu/h
Replace bridge rectifiers,
and then check whether the
system can run normally
Replace IPM board, and
then check whether the
system can run normally
Replace outdoor main board
Yes
No
No
No
No
Yes
Trouble is solved
Yes
Yes
Summary of Contents for 38QUS014D8S2 Series
Page 1: ...SUPER INVERTER SERIES MULTI TYPE Service Manual 2018...
Page 9: ...1...
Page 21: ...13 3 3 Console 16 Drain pipe 195 Hanging arm 700 600 210...
Page 24: ...16 4 3 Console 4 4 Hi wall...
Page 25: ...17 5 Wiring diagram 38QUS018D8S2...
Page 27: ...19 38QUS036D8S4 38QUS042D8S5...
Page 29: ...21 42QSS009D8S 42QSS012D8S 42QZA012D8S...
Page 42: ...11...