-
78
-
(d) Defrosting
1) Defrosting start conditions
Defrosting operation starts when all the follow-
ing conditions are satisfied.
a) If 45
(1)
minutes of cumulative compressor
operating time have passed since defrosting
ended and cumulative compressor operating
time of 30 minutes have passed since heating
operation started (Remote controller: ON)
Note (1) In the case of FDCA301~601, the cumulative
time can be changed to 37 minutes by opening
jumper J7 (SW6-3) on the outdoor unit’s PCB.
b) If 5 minutes have passed since the compres-
sor went ON.
c) 5 minutes of outdoor fan operation have
passed.
d) After all the above conditions have been met,
when the temperature sensed by the outdoor
heat exchanger temperature thermistor (Tho-
R) and outdoor temperature thermistor (Tho-
A) continues for 30 (15) seconds and drops
below the dehumidifying operation start tem-
perature shown in the figure at right.
Note (1) Values in ( ) show in the case of the FDCA801,
1001 models.
—
5
—
2
—
10
—
15
—
14
—
20
—
20
—
18
—
15
—
10
—
50 5610
Outdoor heat exchanger temperature (˚C) [Tho-R]
Outdoor air temperature (˚C) [Tho-A]
—
7
Defrosting operation start temperature SW5-1 ON
Defrosting operation start
temperature zone
Defrosting operation start temperature (Standard)
Ñ
5
Ñ
2
Ñ
10
Ñ
15
Ñ
14
Ñ
20
Ñ
20
Ñ
18
Ñ
15
Ñ
10
Ñ
50 5610
Outdoor heat exchanger temperature (˚C) [Tho-R]
Outdoor air temperature (˚C) [Tho-A]
Defrosting operation start temperature SW3-1 ON
Defrosting operation start
temperature zone
Defrosting operation start temperature (Standard)
⽧Models FDCA301~601
⽧Models FDCA801, 1001
2) Defrosting start temperature change procedure
Turn SW5-1 (SW3-1) on the outdoor unit PCB ON.
a) A cumulative total of 30 minutes of compressor operating time has passed since defrosting ended.
b) When the temperature at the outdoor heat exchanger thermistor (Tho-R) and the temperature at the outdoor air
temperature thermistor (Tho-A) is below the defrost operation start temperature continuously for 30 (15) seconds.
c) Other than items a) and b), the same as standard conditions.
Note (1) Values in ( ) show in the case of the FDCA801, 1001 models.
3) Defrosting end conditions
If any of the following conditions is satisfied, the defrosting end operation starts.
⽧Models FDCA301~601 only
a) If 10 minutes
(1)
have passed since defrosting started.
b) If the temperature at the outdoor heat exchanger thermistor (Tho-R) is 14ºC or higher continuously for 2 seconds.
Notes (1) This setting can be changed to 12 minutes by turning SW5-1 on the outdoor unit PCB ON.
Notes (2) When jumper wire J6 (when SW6-2 OFF) is open, raise the defrosting end temperature and carry out forced defrosting.
⽧Models FDCA801, 1001 only
a) When 10 minutes 20 seconds have passed since dehumidifying started.
b) When the outdoor heat exchanger thermistor (Tho-R) senses a temperature of 12ºC or higher continuously for 10
seconds.
(e) Compressor protection control
(i) Compressor overcurrent protection
⽧Models FDCA301~601 only
1) If a value at or higher than the set value is detected continuously for approximately 0.5 second in the L1 and L2
phases (1 phase model: L phase) on the secondary side of the 52C (sensed by the current sensor (CT)), the compres-
sor stops. After a 3-minute delay, the compressor restarts if the detected current is 1.5 ~ 2 A or lower, but if this
condition is repeated 5 times within 60 minutes of the first detection, the unit is subjected to an abnormal stop
(E33).
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