Si33-105 Operation Flowcharts
Troubleshooting R407C PLUS Series Heat Recovery System 141
Programme dry operation
Programme dry display
Thermostat status?
Fan M1F : 6 minutes stopped
then L operation
Electronic expansion valve Y1E
closed
Drain-up kit M1P : Off after 5
minutes residual operation
Fan M1F : operation: L
Electronic expansion valve Y1E
degree of super heat control
A
(Option)
H
7
H
8
(VF023)
ON
OFF
"
7 Programme dry display
Does not display preset temperature and air flow settings of the controller.
"
8 Thermostat status
Preset temperature during programme dry operation
Fan in operation
Swing flap Air flow direction setting
Swing flap?
Fan MF: Operating at set air flow
rate
Electronic expansion valve Y1E
closed
Drain-up kit (M1P): OFF
Auxiliary electric heater (K1R): OFF
Humidifier (Hu): OFF
A
H
10
H
11
H
9
No
YES
Option
(VF024)
"
9 Fan operation
When fan operation has been selected using the remote controller, operation is turned
OFF by thermostat when temperature control operation has been selected.
"
10 Air flow direction setting
If fan operation is selected with the remote controller, air discharge is 100% horizontal
during heating.
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