-
162
-
(k) Condensate pump motor (DM) Control [FDT and FDUM models only]
(a) Drain motor is started no sooner than the compressor is turned ON during cooling or dehumidifying operation. The drain
motor continues to operate for 5 minutes after the stop of unit operation, stop with the error stop, thermostat stop and at
switching from cooling or dehumidifying operation to blowing or heating operation. When there is any unit subjected to oil
return control, the drain motor is operated for 5 minutes at such occasion.
(b) Overfl ow detection is performed by the fl oat switch at all times regardless of the operating mode. If the fl oat switch circuit is
detected to be open continuously for 3 seconds (or when the fl oat switch is disconnected or a wire is broken), an abnormal
stop (E9) is performed and the condensate pump motor runs until the fl oat switch recovers.
(l) Air
fl ow mode control
Air fl ow mode control can be changed using DIP switch SW9-4 on the indoor PCB.
Anomalous stop
63
Indoor heat exchanger temperature(˚C)
56
Heating operation possible
Cooling operation
10
Indoor heat exchanger temperature (˚C)
1.0
Fan mode
SW9-4 OFF
(Mild Mode Control)
SW9-4 ON
(Powerful mode Control)
Air flow mode
Item
DIP SW
FDTC, FDT, FDEN, FDKN models
Hi, Me, Lo
UHi, Hi, Me
(m) Compressor inching prevention control
1) 3-minute
timer
If the compressor stops due to operation of the thermostat, the Run switch on the remote controller or some trouble, it is not re-
started for 3 minutes. However, when the power is turned ON, the 3-minute timer becomes inactive.
2)
3-minute forced operation timer
a)
The compressor keeps operating for 3 minutes after starting. However, in case that the system is stopped by the remote
controller, or thermostatic OFF caused by changing operation mode, the compressor will stop.
b)
During 3-minute forced operation timer control in heating operation, if the thermostat goes OFF, the louver position is
set to the horizontal position.
Note (1) The compressor stops when protection control starts.
(n) Heating overload protection
If an overload condition is sensed continuously for 2 seconds by the indoor heat exchanger temperature during heating (sensed
by Thi-R1 or R2), the compressor is stopped. After a 3-minute delay, the compressor is restarted. If the overload is sensed 5 times
within 60 minutes of the fi rst time it was detected, an anomalous stop is performed (E8). Also, if the overload state is sensed
continuously for 6 minutes, it results in an anomalous stop.
(o) Frost prevention during cooling, dehumidifi cation
1) In order to avoid frosting on the heat exchanger during cooling and dehumidification, 3(4) minutes after compressor operation
starts, if the indoor heat exchanger temperature (detected by Thi-R1 or R2) is 1.5˚C or lower after 3 minutes since the compres-
sor starts, the compressor speed is reduced. 30 seconds (1 minute) later, the indoor unit heat exchanger temperature is checked
every 1 minute and if the temperature is still 1.5°C or lower, compressor speed is reduced again. If the temperature becomes
lower than 3.5˚C continuously for 5, 6 minutes, this control is terminated.Furthermore, even if the compressor speed is reduced,
if the indoor heat exchanger becomes as shown in the diagram below, the unit switches to fan mode.
Note (1) Values in ( ) show for the 302~1002 models.
(p) Thermistor (Air return, heat exchanger) disconnected wire detection.
If the temperature sensed by the thermistor is –50°C or lower continuously for 5 seconds, the compressor stops. After a 3-minute
delay, the compressor is restarted, but if a recurrence is detected within 60 minutes of the 1st time, or if it is sensed continuously
for 6 minutes, it results in an anomalous stop (E6, E7).
Notes (1) When the unit is shipped, SW9-4 is turned OFF.
Notes
(2) If SW9-4 is ON, the fan operates in Lo even during hot start and
heating thermostat OFF.
SW9-4 OFF
(Standard)
SW9-4 ON
(High speed)
Air flow mode
Item
DIP SW
FDUM model
Hi, Me, Lo
UHi, Hi, Me
Notes (1) When the unit is shipped, SW9-4 is turned OFF.
Notes
(2) If SW9-4 is ON, the fan operates in Lo even during hot start and
heating thermostat OFF.
(b) Indoor fan speed switching
In cooling operation (except drying), when frost prevention control is started, indoor fan speed is switched.
1) FDTC, FDT(151~401), FDU, FDUM, FDEN model
a) When the suction temperature of indoor units (detected by Thi-A) is lower than 23°C, this control is invalid. Two hours
after frost prevention control, this control is terminated.
b) Upon another detection within 15 minutes after frost prevention control, the indoor fan speed is increased by 1 tap.
Note (1) Indoor fan speed can be increased by up to 2 taps.
c) This control can be set to Enabled (ON)/ Disabled (OFF) with the dip switch SW8-2(J6) on the indoor units control board.
2) FDT(501, 602), FDKN model
a) When the detected suction temperature of indoor units (detected by Thi-A) is higher than 23°C, and the detected temperature
of heat exchanger of indoor unit (Thi-R1 or R2) is lower than 3.5°C, increase the indoor fan speed by 20rpm.
b) Upon another a) detection after indoor fan speed is increased, increase the indoor fan speed by 20rpm again.
Note (1) Indoor fan speed can be increased by up to 2 taps.
c) This control can be set to Enabled (ON)/ Disabled (OFF) with the dip switch SW8-2(J6) on the indoor units control board.
Summary of Contents for FDCVA1002HESAR
Page 107: ... 106 60 17 150 b Wireless remote controller Unit mm ...
Page 119: ... 118 Model FDCVA1002HESAR Polar white ...
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