Troubleshooting by Indication on the Remote Controller
257
Troubleshooting
YES
YES
NO
NO
YES
The
suction pipe
temperature
minus coil temperature
is 20 ˚C or
higher.
Shortage of
refrigerant,
closing of stop
valve or
refrigerant
system is
clogged.
Requires check
of refrigerant
system.
YES
Replace the main
outdoor unit
PCB.
Shortage of gas
or refrigerant
system is
clogged.
Requires check
of refrigerant
system.
Cooling
NO
NO
CHECK 12
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Low
pressure is 0.1 MPa
or less.
The
voltage
of
connector pins
(2) and (3) on
main outdoor unit
PCB is 0.8 VDC or less.
(Low pressure sensor
output voltage)
Replace the low
pressure
sensor.
A
