Standard Operation Sequence; Cooling Operation - Hitachi FSXN Series Service Manual

5 Control system

5.2 Standard operation sequence

5.2.1 Cooling operation

Power to Power to PCB
I.U.: ON in I.U.: ON
Setting
at COOL
High
Air Flow
Pressing
Change Over
FAN Switch
Switch
Low
Pressing
Temp. Switch
Pressing
RUN/STOP
Switch
I.U.
Cooling
Air Intake
Operation
Temp.
Lower than
Set Temp.
(Thermo-OFF)
to 1
97
SMGB0065 rev. 1 - 12/2010
OFF
(Higher than
Activation Level)
FS
ON
(Lower than
Activation Level)
Medium
Switch: Increasing Set Temp.
Switch: Decreasing Set Temp.
Higher than
Set Temp.
> -5ºC
(Thermo-ON)
Outdoor
Temp.
< -5ºC
I.U.: Indoor Unit
O.U.: Outdoor Unit
Auto - louver
only for Indoor Unit
0 Reset
with Auto-Louver
PID Control for I.U.
Electronic Expansion Valve
Thermo-OFF
Start of Transmitting between
I.U. and O.U.
Start of Transmitting between
I.U. and Remote Control Switch
MD : ON
for Unit with
Drain Pump
COOL Indication
HIGH Indication
MEDIUM
Indication
LOW Indication
Set Temp. Indicated
Run LED: ON, RUN is Indicated
Power to MIF : ON
No
3 min.
Yes
5