Ipm Module Protection Error (P6) - Carrier 38MGR Series Service Manual

DIAGNOSIS AND SOLUTION (CONT)

IPM module protection error (P6)

ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
IPM Module Protection
Check whether the voltage range
of P-N on IPM module is normal.
DC277-356V for 18-24KBtu/h;
DC277-410V for 36KBtu/h.
whether the
connecting line between
the main board and the IPM
module is connected
Check whether the
compressor connecting line
is connected correctly.
Replace the IPM module.
Check whether the system
works normally.
Check if
the outdoor fan runs
properly or if the outdoor
is good.
Replace the main board.
Check whether the system works
normally.
Replace the compressor.
Check whether the system works
normally.
Yes
62
P6
When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED displays
"P6" and the AC turns off.
• Wiring mistake
• IPM malfunction
• Outdoor fan assembly faulty
• Compressor malfunction
• Outdoor PCB faulty
No
Yes
Check
No
Is it ok or not?
tight.
Yes
No
No
Yes
No
No
Check whether the fan motor
resistance is normal. If not,
replace the fan motor.
Yes
For other models. refer to the
Fan Speed Out of Control
Determine the cause and
resolve it.
No
Yes
No
Yes
Specifications subject to change without notice.
Check whether the input
power supply is correct.
208-230V, 1N, 60Hz
Yes
Check whether the
power supply line is
connected correctly and
Yes
Connect well.
Is it ok or not?
Check whether the lines
in E-part box are
Yes
resistance between each of the two terminals.
Check whether there is a instance
where the resistance value is 0.
Yes
reactor is normal. If the line is broken,
the resistance of the two ports is
except for M4OC-36HRFN1-M).
Check whether the PFC module is broken.
Trouble is solved.
Regulate it to correct, then
No check whether the system
can work normally.
No
Connect it correctly
No
Is it ok?
No
No
Is it ok or not.
No
No
Yes
No
reactor or replace the PFC module.
38MGR-04SM