Outdoor Unit Operation Flowchart - Panasonic Urban Multi MX1R Series Service Manual

Operation Flowcharts
1.2

Outdoor Unit Operation Flowchart

∗ 16 If the outdoor unit malfunction display lamp is on then this either indicates that the outdoor unit
∗ 17 Keep on operations for 15 minutes after the inverter compressor has stopped.
330
Start
Power on
Initialize electronic expansion
valve (Y1E)
Fan or temperature control?
Temperature
control
Restart
prevention in progress
(5 minutes) ?
NO
Has indoor
unit thermostat on
operation signal been output
to more than
1 unit?
YES
Actuation
of safety device?
NO
Is
outdoor unit malfunction
display lamp on?
NO
Cooling
Cooling or heating?
Cooling operation
B
operation has been terminated abnormally or warns that there is refrigerant shortage or else that
there is a piping or wiring fault (operations will continue). (Refer to Indoor Unit Control ∗ 1)
Note: The crank case heaters
compressors are off.
Fan
YES
NO
YES
Outdoor unit malfunction display
lamp : ON
YES
Push reset ON/OFF switch.
Outdoor unit malfunction display
lamp : OFF
Heating
Inverter compressor magnetic contactor K1M : OFF
Output frequency to inverter INV : 0 Hz
Standard compressor magnetic contactor K2M : Closed
Electronic expansion valve Y1E : OFF
Heating operation
Solenoid valve (hot gas) Y2S : OFF
Solenoid valve (injection) Y3S Y4S : OFF
∗17
Solenoid valve (pressure equalizing bypass)
: ON or OFF
4-way valve Y1R : On during heating operation , off
during cooling or fan operation.
are on when the magnetic relays of their respective
CH
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
PACD011001C2
∗16
(M060)