Specifications

SERVICE
Betbre pertbnning recomlnended maintenance, be sure
unit main power switch is turned off Failure to do so may
result in electrical shock or injury tbnn rotating fan blade.
Pumpdown Procedure -- The systemmay be pmnped
down in order to make repairs on the low side without losing
complete retiigerant charge.
1. Attach pressure gage to suction service valve gage port.
2. Frontseat the mixed phase line valve.
The unit coils hold only the factory-desiNlated amount of
refrigerant. Additional refrigerant may cause units to
relieve pressure tbaough the compressor internal pressure
relief valve (indicated by a sudden rise of suction pressure)
before suction pressure reaches 20 psig. If this occurs, shut
off unit immediately then fiontseat the suction valve and
remove and recover excess retiigerant fotbwing accepted
practices. Equipment damage may result.
3. Start unit and run until suction pressure reaches 5 psig.
4. Shut unit offand fiontseat suction valve.
5. Depressurize low side of unit and recover retiigerant
following accepted practices.
Filter Drier -- Whenever the filter drier is exposed to the at-
ruosphere it must be replaced. Only use factory specified liquid-
line filter driers with rated working pressure of at least 600 psig
or 1Ylore.
NOTE: Do not install a suction-line filter drier in the mixed
phase line.
Refrigerant Charging
To prevent personal injury, wear safety glasses and gloves
when handling reti-igerant. Do not overcharge system d
this can cause compressor flooding.
NOTE: Do not vent or depressurize unit retiigerant to atmo-
sphere. Relnove and recover refiigerant following accepted
practices.
TROUBLESHOOTING
See Tables 6 and 7 for troubleshooting intbnnation.
Fault Code -- Once a failure occurs with the indoor unit in
operation, the green LED on the indoor unit flashes at intervals
of 0.5 seconds. The fauh code is deduced fioln the number of
times the _een LED flashes, blocking unit operation. Between
one flash cycle and the next one, a pause of 3 secoMs elapses.
Table 6 -- Green LED (Indoor Unit Fault)
CODE DESCRIPTION
3 Room Air Sensor Fault
4 Indoor Unit Coil Sensor Fault
14 Outdoor Unit Air Sensor Fault
14