En-13
Charging port
Charging port cap
3-way valve
Service hose
Terminal blocks
Service port
Service port cap
Service hose
Reactors
11.1. Preparation for pump down
Con
fi
rm that the power is off, and then open the service panel.
11.2. Pump down procedure
(1) Check the 3-way valves (both at the liquid side and gas side) are opened.
(2) Turn the power on.
POWER
MODE
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
(3) Press
PUMP DOWN
switch for 3 seconds or more after 3 minutes after power on.
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
LED display lights on as shown in the above
fi
gure, and the fans and the
compressor start operating.
(4) LED display will change as shown below about 3 minutes after the compressor
starts. Fully close the 3-way valve on the liquid pipe side at this stage.
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
If the valve on the liquid pipe side is not closed, the pump down cannot be
•
performed.
(5) When LED display changes as shown in the below
fi
gure, close the 3-way valve on
the gas pipe side tightly.
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
If the valve on the gas pipe side is not closed, refrigerant may
fl
ow into the piping
after the compressor stops.
Step (5)
Closing direction
Step (4)
Hexagon wrench
Liquid pipe
Gas pipe
Closing direction
(6) LED display changes after 1 minute as shown in the
fi
gure below.
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
Fans and compressor stop automatically.
If the pump down is successfully completed (the above LED display is shown), the
outdoor unit remains stopped until the power is turned off.
(7) Turn the power off.
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
PUMP DOWN is completed.
Notes:
To stop pump down, press the
•
PUMP DOWN
switch again.
To start the pump down again after the compressor is automatically stopped due to an
•
error, turn the power off and open the 3-way valves. Wait 3 minutes, turn the power on
and start the pump down again.
When starting the operation after completion of the pump down, turn the power off,
•
and then open the 3-way valves. Wait 3 minutes, turn the power on and perform a test
run in the “COOL” operation mode.
12. ERROR CODE DISPLAY
When an error occurs, “short-press” the
ENTER
switch once. The number of blinks of the
LED indicates the type of error.
12.1. How to check error code
12.1.1. Display when an error occurs
ERROR
TEST
RUN
PUMP
DOWN
LOW NOISE
PEAK CUT
POWER
MODE
(L1) (L2)
(L3) (L4) (L5) (L6) (L7)
Blinks
(Hi-speed)
Check that the ERROR LED blinks, and then short-press the
ENTER
switch once.
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1/29/2013 4:44:20 PM
1/29/2013 4:44:20 PM
