78
Installation and Maintenance
Service Manual
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Malfunction indicator of outdoor unit
If the fault is eliminated?
If the fault is eliminated?
Malfunction
D5
D6
D16
D30
Overload
Air exhaust
check points:
electronic expansion valve
the electronic expansion valve
overload protector
the air exhaust temperature sensor damaged
20 minutes after
the unit is
powered off
Is the overload protector SAT
connected well?
Check if the resistance
of overload protector is less than 1000ohm
in ambient temp.
Connect the wires
correctly according
to wiring diagram
Is the terminal FA of
the electronic expansion valve connected
correctly?
Replace the
overload
protector SAT
Check if the coil of electronic expansion
valve is installed correctly on the valve
Check if the electronic expansion
valve is blocked
Check if the refrigerant is leaked,
if yes, recharge refrigerant
Check if the air exhaust
temperature sensor is normal according to
the Resistance Table
Replace the air
exhaust temp. sensor
Replace the outdoor
control panel
End
Fault with outdoor unit)
