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Forced drain pump operation
Setup from a unit side.
1 Turn power on after selecting the emergency operation mode with a setting on the indoor unit control PCB (SW9-3 ON) and
disconnecting the CnB connector on the board. Then , the drain pump will start a continuous operation 15 seconds later.
(Note : The blower will also start operation in tandem)
2 When a drain test is completed, reinstate the setting to cancel the emergency operation mode (SW9-3 OFF) and plug in the
CnB connector on the board.
(When electrical work is not completed, connect a convex joint to the drain pipe joint area, arrange an inlet and check leaks and drain connections of the pipe)
Setup from a remote controller side.
Drain pump operation from a remote controller unit is possible. Operate a remote controller unit by following the steps described
below.
1. To start a forced drain pump operation
1 Press the
TEST
button for three seconds or longer.
The display will change from “
SELECT ITEM”
“
SET”
“
TEST RUN
”
2 Press the
button once while “
TEST RUN
” is displayed, and cause “DRAIN PUMP
” to be displayed.
3 When the
SET
button is pressed, a drain pump operation will start.
Display: “DRAIN PUMP RUN”
“
STOP”
2. To cancel a drain pump operation.
1 If either
SET
or
ON/OFF
button is pressed, a forced drain pump
operation will stop.
The air conditioning system will become OFF.
10
)Drainage from the lower drain socket
Only if the drain pipe can be installed in a downhill grade
(1/50-1/100), the lower drain socket can be used for con-
necting to the drain pipe as illustrated.
(Disconnect the connector for the drain motor)
As shown in the sketch to the right, disconnect the drain
motor connector CnR ( blue color coding).
If the system is started with this connector connected as
is, drain water is discharged out of the upper drain socket
causing a heavy water lekage.
The upper drain socket
A hard PVC general-purpose pipe
Heat insulator
Rubber plug
(Remove the rubber plug)
The lower drain socket
(Piping connection)
Disconnect Condensate
motor connector
CnR (2P Blue)
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