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2) Test operation control
a) Each protective control and abnormal sensing control is activated.
b) If SW5-4 (SW3-4) is switched back during test operation, stop control is implemented and the cooling and heating
operations are toggled.
c) Remote control unit settings and displays during test operation
Remote control unit settings, display contents
Capacity
Mode
Cooling operation
Heating operation
Cooling. The initial setting temperature is 5ºC. The temperature at the indoor
unit’s heat exchanger is displayed in the return air temperature display.
The initial set temperature for heating (preparation) is 30ºC and the return air
temperature is displayed in the return air temperature display.
Note (1) Iteme in ( ) show in the case of FDCA801, 1001 models.
(j) Pump down control (Models FDCA801, 1001 only)
If the pump down switch (SW3-5) is turned ON during an operation stop or during an abnormal stop (except when the
thermostat is OFF), pump down operation starts. (This control is invalid during indoor unit operation. It is valid during
indoor unit abnormal stop or when the indoor units are OFF.)
1) Control contents
a) The compressor starts in the cooling mode.
b) The red and green (LED’s) on the outdoor unit control board blink continuously.
c) Each protective and abnormal detection control is valid except low pressure control.
d) The outdoor fan is controlled as normal.
e) The electronic expansion valve (cooling, heating) is fully open.
2) Control end conditions
Stop control is executed when any of the following conditions exists.
a) A low pressure of 0.87 MPa or lower is detected (PSL).
A Red LED: On continuously, Green LED: Blinking; shows a remote control stop.
B When the low pressure (PSL) rises above 0.87 MPa, it is possible to restart.
C The electronic expansion valve (cooling, heating) is fully open.
b) Stopped by Error Detection Control
A Red LED: Blinks continuously, Green LED: Blinks.
B Restarting is impossible. Reset the power supply to resume normal operation.
C The electronic expansion valve (cooling, heating) is fully open.
c) The compressor’s cumulative operating time under pump down control becomes 5 minutes.
A Red LED: Off, Green LED: Blinks, Remote control stop.
B Resumption of pump down control is possible.
C The electronic expansion valve (cooling, heating) is fully open.
Caution: Communications with the indoor units is cancelled when the pump down switch is pressed, so E5, “Trans-
mission Error” is displayed by the indoor units and the remote controller. However, there is no error.
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