Midea MHC-96HWD1N1(A) Service Manual page 49

MCAC-UTSM-201503

P6: Inverter module protection
P6, L0~L9 error codes can't display on digital tube automatically, these error codes will display on digital
tube only through SW3 button (pressure SW3 ten times, every one second for a time)
If the system display three times P6 protection in 60 minutes, the system will stop and display H4 error
code. When the system displays H4 error code, the system can resume only by restarting the machine. At
this time, malfunction should be disposed promptly to avoid further damage.
H4 will display if P6 occur
3 times in 30 minutes
Check whether inverter
module is broken, and
eliminate the situation
that DC generatrix is
connected inversely
P6, L0~L9 error codes
can't display on digital tube
automatically, these error
codes will display on digital
tube only through SW3
button (pressure SW3 ten
times, every one second
for a time)
R410A Full DC Inverter Split Duct Type Technical Manual
L0: module
protection
L1: low voltage
protection
L2: high voltage
protection
L4: MCE error
L5: Zero speed
protection
L7: Phase sequence
error
L8: frequency
difference in one
second more than
15Hz
L9: frequency
difference between the
real and the setting
frequency more than
15Hz
Check module
and compressor
Check power supply
of module
Check power supply
of module
Check module
and electric circuit
Check electric circuit
and compressor
Check module
and wiring
connection
Check
compressor
Check
compressor
48