LFIS-B-1211
Troubleshooting
Electrical Control System
113
2.4.4.17. P6 malfunction (For three phases units)
At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or
close to 0, the IPM is defective. Otherwise, please follow the procedure below:
P6 display
IPM module protection
Check whether the voltage
range of P-N on IPM module is
normal? DC 350-650V
Yes
Yes
No
Yes
Check whether the
input power supply is
correct? 380-415V, 3N,
50Hz
No
No
Regulate it to correct,
then check whether the
system can work
normally?
Check whether the
power supply line is
connected correctly
and tightly
Yes
Connect it correctly
and tightly, check ok
or not?
No
Check whether the
connecting line between main
board and the IPM module is
connected tightly
Yes
Connect it tightly,
check ok or not?
No
No
No
Connect it well,
check ok or not?
Check whether the
connecting line of the
compressor is connected
correctly or tightly
Replace the IPM module,
check whether the system
can work normally?
No
No
Replace the main board;
check whether the system
can work normally?
No
Replace the compressor,
check whether the system
can work normally?
Yes
Yes
Check whether the
lines in E-part box are
connected tightly
Yes
Connect it tightly,
check ok or not?
No
No
Yes
No
Replace the bridge rectifiers
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
resistance is 0
Check whether the 3300µF/400V
electrolytic capacitor is normal?
Replace this electrolytic
capacitor
Yes
No
No
Yes
Trouble is solved
Summary of Contents for SUPER DC INVERTER SERIES
Page 1: ...Contents i New Energy Requirement SUPER DC INVERTER SERIES Service Manual 2012 LFIS B 1211 ...
Page 2: ...ii General Information ...
Page 4: ......
Page 17: ...LFIS B 1211 Service Space Indoor Units 13 3 Service Space 1000mm 1000mm 1000mm 1000m m ...
Page 23: ...LFIS B 1211 Field Wiring Indoor Units 19 9 Field Wiring ...
Page 36: ...Duct Type LFIS B 1211 32 Indoor Units 10 Field Wiring ...
Page 40: ...Duct Type LFIS B 1211 36 Indoor Units 3 Service Space ...
Page 44: ...Field Wiring LFIS B 1211 40 Part 3 9 Field Wiring ...
Page 50: ...Wiring Diagrams LFIS B 1211 46 Part 3 KOU 36HFN1 RRC4 ...
Page 100: ...Troubleshooting LFIS B 1211 96 Electrical Control System 2 4 2 3 Up down panel is not closed ...
