Kaisai K2OC-18HFN32, Руководство по обслуживанию

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10.3.3.10 IPM module protection (ODU P6)
Check whether the voltage range
of P-N on IPM module is normal?
No
DC277-356V for 18-28KBtu/h;
DC277-410V for 36-42KBtu/h
Check whether the input
power supply is correct?
208-230V, 1N, 60Hz
Regulate it to correct, then
No check whether the system
can work normally?
Yes
Yes
No
Check whether the connecting
line between main board and
No
the IPM module is connected
tightly
Connect it tightly,
check ok or not? Check whether the
power supply line is
No
connected correctly and
tightly
Connect it correctly
and tightly, check ok
or not?
Yes
No
Yes
No
Check whether the connecting
line of the compressor is No
connected correctly or tightly
Connect it well, check
ok or not?
Check whether the lines
Connect it tightly,
in E-part box are
connected tightly
No
check ok or not?
Yes
No
Replace the IPM module,
check whether the system can
work normally?
No
Yes
No
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
No
Check if the outdoor fan
runs properly or the outdoor
unit ventilation is good.
No
Replace the main board; check
whether the system can work
normally?
Yes
Yes
Yes
Yes
Check whether the connecting line of
every reactor is normal? If the line is
broken, the resistance of the two ports is
∞
（
models except for K4OA-36HFN1-
Q,K4OD-28HFN K5OC-36HF
；
Check whether the PFC module
broken (for K4OA-36HFN,K4OD-
No
28HFN, K5OC-36HFN1,K50D-
42HFN)
No
Yes
Replace the compressor, check
whether the system can work
normally?
Yes
Trouble is solved
Replace the bridge rectifiers
IPM module protection
Replace the connecting line or
reactor or replace the PFC
module(for K4OC-36HRFN
K50D-42HFN
Check whether the resistance of
the fan motor is normal. If not,
replace the fan motor.
For
other models, r
efer to the
solution of fan speed has
been
out of control
malfunction . F i nd out the
cause and have it solved.