Midea MCA3U-12HRFN1-M(C) User Manual

233
P6/J6 displayed
Low pressure protection
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?
Yes
Yes
Reconnect the low pressure
protector and main control board
Replace outdoor main board.
Does a problem still exist?
No
Replace low pressure protector
No
Is the low pressure
protector broken?
Is the outdoor ambient
temperature too low?
No
Stop the unit Yes
Open the valve core of the
high pressure valve
No
Is the valve core of the high
pressure valve fully opened?
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.
No
Yes
Yes
No
Check whether the
refrigerant system is
functioning properly.
When the level of refrigerant is not
sufficient, doe the system function
properly after more refrigerant is
added?
No

Midea MCA3U-12HRFN1-M(C) Specifications

General

Brand	Midea
Model	MCA3U-12HRFN1-M(C)
Category	Air Conditioner
Language	English