Pioneer LISAS-B-1403, Service Manual

Page: 135 / 151

Troubleshooting
Electrical Control System 133
2.4.4.7. E5 malfunction (For single phase units)
Voltage protection
Check the voltage of
outdoor unit power supply,
whether the voltage
between L(1) and N is about
220~240VAC
Check the power supply
Check whether the voltage
of IPM board P and N is
normal? DC277-356V for
18K/24K/30KBtu/h; DC277-
410V for 36K/48KBtu/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
E5 display
Replace the power board,
then check whether the
system can run normally
No
Yes