Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 61

1 0 - 8 . E M E R G E N C Y O P E R A T I O N
Inspected content
Check code
U4 Open/ short of pipe thermistors (TH3/ TH6/ TH7 / TH32/ TH33/ TH8)
Open of pressure sensor (T
Communication error other than outdoor unit
–
( 2 ) C h ec k th e following items and c autions for emergenc y op eration
1
2
3
4
5
( 3) E mergenc y op eration p roc edure
1
2
3
4
5
( 4 ) R eleasing emergenc y op eration
1
2
3
4
OCH526C
)
63HS
SW4
Heating
ON
ON
1 2 Cooling
OFF
CN31
Shorting pins
SW4
Heating
ON
1 2 Cooling