Haier MRV 5 Series Troubleshooting Manual page 9

Power again，feel the 4-way valve
temperature, check if the
temperature as below photo
hot
Replace the
4-way valve
TIPS:
Check method：
Power again, in cooling mode,
touch the 4 pipes of the 4-way
valve by hand, if the pipe
temperature feels as shown,
the 4-way valve is normal;
otherwise, the 4-way stop valve
is abnormal.
In heating mode, touch the 4
cool
pipes of the 4-way valve by
hand, if the pipe temperature f
eels as shown, the 4-way valve
is normal; otherwise, the 4-way
stop valve is abnormal.
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