Toyotomi CCT 140IUINV Service Manual page 94

2.4.3.14. P6 malfunction (For single phase units)
P6 display
IPM module protection
Check whether the voltage
range of P-N on IPM
module is normal?
410V
Yes
Check whether the
connecting line between main
board and the IPM module is
connected tightly
Yes
Check whether the
connecting line of the
compressor is connected
correctly or tightly
Yes
Replace the IPM module,
check whether the system
can work normally?
No
Replace the main board;
check whether the system
can work normally?
No
Replace the compressor,
check whether the system
can work normally?
Yes
Electrical Control System
No
DC277-
Connect it tightly,
No
check ok or not?
No
Connect it well,
No
check ok or not?
No
Yes
Yes
Check whether the
input power supply is
correct? 220-240V, 1N,
50Hz
Yes
Check whether the
power supply line is
connected correctly
and tightly
Yes
Check whether the
lines in E-part box are
connected tightly
Yes
Check whether the bridge rectifiers
are normal? Use the multimeter to
measure the resistance between
each two terminals, check whether
there is the condition that value of
Yes
Check whether the PFC module
broken
Trouble is solved
Troubleshooting
Regulate it to correct,
then check whether the
No
system can work
normally?
No
Connect it correctly
No and tightly, check ok
or not?
No
Connect it tightly,
No
check ok or not?
No
resistance is 0
Yes
Replace the bridge rectifiers
Replace the connecting line or
reactor or replace the PFC
module
No
No
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