MrCool DIY-MULTI4-36HP230C User Manual

 Troubleshooting 39 
Voltage protection
Voltage protection
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 9. Check Procedures
Measure whether the voltage
between P and N is normal
refer to 9. Check Procedures
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
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.

MrCool DIY-MULTI4-36HP230C Specifications

General

Brand	MrCool
Model	DIY-MULTI4-36HP230C
Category	Air Conditioner
Language	English