PACD011001C2 Operation Flowcharts
Troubleshooting UM Combination “MA1R Series” Using R-407C 483
1. Operation Flowcharts
1.1 Indoor Unit Operation Flowchart
Start
Power on
Louver lock detection
Remote contoller lamp on
Operation ON/OFF?
Action of safety device?
Fan or Temperature control?
Cooling or heating?
Cooling operation Heating operation Fan operation
Is operation display
lamp blinking?
Initialize electronic expansion
valve YIE
Operation display lamp: OFF
Operation display: Blinking
Malfunction code: Displayed
Operation display: Off
Malfunction mode Display:
Cancelled
Fan M1F :OFF
Louver M1S :OFF
Drain-up kit (M1P): OFF
Humidifier (Hu) : OFF
Electronic expansion valve
Y1E Closed
Optional auxiliary electric
heater (K1R): OFF
Depress reset Operation ON/OFF
switch
Operation display lamp: ON
Air flow rate setting display: ON
Air flow direction setting display:
ON
Temperature setting display: ON
Indicates previous settings for air flow
rate and direction and temperature
NO
ON
OFF
YES
NO
Option
YES
Fan
(Ventilation)
Temperature
contorl
HeatingCooling
A
∗1
∗2
∗3
(VF021)
∗
1 In the event of a malfunction, the malfunction code is displayed in the remote controller’s malfunction
code display.
∗
2 When the auxiliary electric heater is on, the fan stops after one minute residual operation.
∗
3 When the drain-up kit is ON, it stops after five minutes residual operation.
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