Midea Super DC Series User Manual

Troubleshooting
Electrical Control System 207
2.4.4.18. P6/J6 Malfunction
Malfunction conditions
If the sampling voltage is not 5V, the LED displays a failure
code.
Possible causes
● Wiring mistake
● Faulty over load protector
● System blockages
● Faulty outdoor PCB
J6 displayed
J6 displayed
Low pressure protection
Low pressure protection
Are the low pressure
protector and main control
board wired properly?
Are the low pressure
protector and main control
board wired properly?
Method: Disconnect the plug.
Measure the resistance of the
low pressure protector. If the
protector is normal the value is
o. Does a problem still exist?
Method: Disconnect the plug.
Measure the resistance of the
low pressure protector. If the
protector is normal the value is
o. Does a problem still exist?
Yes
Yes
Reconnect the low pressure
protector and main control
board
Reconnect the low pressure
protector and main control
board
Replace outdoor main board.
Does a problem still exist?
Replace outdoor main board.
Does a problem still exist?
No
Replace low pressure protector
Replace low pressure protector
No
Is the low
pressure protector
broken?
Is the low
pressure protector
broken?
Is the outdoor ambient
temperature too low?
Is the outdoor ambient
temperature too low?
No
Stop the unit
Stop the unit Yes
Open the valve core of the
high pressure valve
Open the valve core of the
high pressure valve
No
Is the valve core of the
high pressure valve fully
opened?
Is the valve core of the
high pressure valve fully
opened?
Is the indoor fan running
properly in cooling mode?
Is the indoor fan running
properly in cooling mode?
Refer to the solution to the malfunction
of fan speed being out of control. Find
the cause and resolve the problem.
Refer to the solution to the malfunction
of fan speed being out of control. Find
the cause and resolve the problem.
No
Yes
Yes
No
Check whether the refrigerant
system is functioning properly.
Check whether the refrigerant
system is functioning properly.
When the lvel of refrigerant is not
sufficient, doe the system function
properly after more refrigerant is
added?
When the lvel of refrigerant is not
sufficient, doe the system function
properly after more refrigerant is
added?
No

Midea Super DC Series Specifications

General

Brand	Midea
Model	Super DC Series
Category	Inverter
Language	English