Sharp AE-XM30GR Service Manual page 20

3. When all rooms are not heated
The heating cycle is normal.
Pressure check
Does the air get cooler in the
cooling operation mode?
No
Refer to 1 All rooms are
not cooled.
Yes Check the four-way valve.
Has the cycle been switched?
No
Is AC230V applied between
the connector(CN4) 1 and 3
of the 4-way valve ?
3 – 9
Yes
Press the ON switch on the
remote control to run the air
conditioner.
Set the temperature to 32
in the heating mode and
start operation.
No
Is the outdoor compressor
Yes
running?
No
A
To
1-2 AE-XM30FR;
Yes
Replace the 4-way valve.