Ipm Module Compressor (Odu P4) - Heat Controller A-VMH18DC-1 Service Manual

Heat Controller, Inc.

9.3.2.9 IPM module compressor (ODU P4)

IPM module protection
Check whether the voltage range
of P-N on IPM module is normal?
DC277-356V for 18-27KBtu/h;
DC277-410V for 36KBtu/h
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.
Yes
VMH SerieS
No
Connect it tightly,
No
check ok or not?
No
Connect it well
No
check ok or not?
No
41
Check whether the
input power supply is
No
correct? 220-240V,
1PH 60Hz
Yes
No
Check whether the
power supply line is No
connected correctly
and tightly
Yes
No
Check whether
the wires in E-part
No
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
the value of resistance is 0
Yes
Check whether the connecting line
of every reactor is normal? If the
line is broken, the resistance of the
two ports is (for all models except
A-VMH36QC-1); Check whether the
PFC module broken A-VMH36QC-1
Service Manual
Regulate it to
correct, then check
whether the system
can work normally?
Connect it correctly
and tightly, check ok
or not?
Connect it tightly,
check ok or not?
No
No
Replace the bridge rectifiers
No
Replace the connecting
line or reactor or replace
the PFC module for a
A-VMH36QC-1