Troubleshooting
130
Electrical Control System
2.4.4.8. P6 malfunction
Check whether the power
voltage is normal.
Check whether the power
voltage is normal.
Measure whether outdoor
terminal voltage is normal
？
Measure whether outdoor
terminal voltage is normal
？
Restart the unit when the power
supply gets normal
Restart the unit when the power
supply gets normal
No
Yes
No
Reconnect it well
Reconnect it well
Yes
Yes
No
Replace the IPM board, If the IPM board
and main board is in a board, replace the
outdoor main PCB
Replace the IPM board, If the IPM board
and main board is in a board, replace the
outdoor main PCB
Yes
Replace the PFC module(If has)
Replace the PFC module(If has)
No
Yes
Measure whether the voltage
between L and N is normal
？
Measure whether the voltage
between L and N is normal
？
Yes
Measure whether input voltage
of bridge rectifier is normal
？
Measure whether input voltage
of bridge rectifier is normal
？
Yes
No
No
Measure whether the voltage
between P and N is normal
refer to the
Appendix
3
？
Measure whether the voltage
between P and N is normal
refer to the
Appendix
3
？
Replace the bridge
rectifier
Replace the bridge
rectifier
No
Check whether
bridge rectifier is
normal
Check whether
bridge rectifier is
normal
Check the wiring of
reactor or inductance
Check the wiring of
reactor or inductance
Reconnect the
wiring
Reconnect the
wiring
No
Check whether reactor
or inductance is normal
Check whether reactor
or inductance is normal
Yes
Replace reactor or
inductance
Replace reactor or
inductance
No
Check the wiring of
power wires well or
correctly
Check the wiring of
power wires well or
correctly
Reconnect it well
Reconnect it well
Check the wiring of
L and N well or
correctly
Check the wiring of
L and N well or
correctly
Reconnect it well
Reconnect it well
Check the wiring of
bridge rectifier well
or correctly
Check the wiring of
bridge rectifier well
or correctly
E5 display
E5 display
Voltage protection of compressor
Voltage protection of compressor
P6
Summary of Contents for MUCR-H6 Series
Page 15: ...Air Velocity Distributions Reference Data Indoor Units 13 30 42K Cooling Heating ...
Page 16: ...Air Velocity Distributions Reference Data 14 Indoor Units 48 60K Cooling Heating ...
Page 21: ...Field Wiring Indoor Units 19 10 Field Wiring ...
Page 30: ...Static Pressure 28 Indoor Units 5 Static Pressure MUCR 12 H6 MUCR 18 H6 ...
Page 31: ...Static Pressure Indoor Units 29 MUCR 24 H6 MUCR 30 H6 ...
Page 32: ...Static Pressure 30 Indoor Units MUCR 36 H6 MUCR 42 H6 MUCR 48 H6 MUCR 48 H6T MUCR 60 H6T ...
Page 41: ...Service Space Indoor Units 39 3 Service Space ...
Page 52: ...50 Indoor Units 10 Field Wiring ...
Page 61: ...Field Wiring Indoor Units 59 10 Field Wiring MUCSR 12 H6 MUCSR 18 H6 ...
Page 64: ...Dimensions 62 Outdoor Units Model Unit mm W D H W1 A B 48 60 952 415 1333 1045 634 404 ...
Page 95: ...Refrigerant pipe installation Installation 93 ...
