Mitsubishi Electric MSH09TW Service Manual page 77

MXZ30TN MXZ30TN2 only
• Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit.
Then, check the outdoor unit with referring to this page.
Operation start
Check the outdoor unit
LED indicator
OFF
I Check of power supply
See page 89.
• Indoor unit • COOL or HEAT
serial signal operation only
K Check of
error
J Check of
R.V.coil
serial signal See page 90.
See page 89.
"00"
• When cooling, heat • When cooling,
exchanger of dew drops in the
non-operating indoor non-operating
unit frosts. indoor unit
•When heating, non Check of mis-
operating indoor unit piping.
gets warm.
L Check of LEV
See page 91.
77
Display other than "00"
Refer to indicator list
See page 79, 80.
• When heating, • When cooling,
room does not get room does not
warm. cool.
M Check of M Check of
inverter,compressor inverter,
See page 91. compressor
Check mis-piping See page 91.
Shortage of capacity