-
90
-
Retention
Speed is reduced. (The speed is reduced
once every minute.) (151~251 models)
Expansion valve control
(301~601 models)
Release
Discharge pipe temperature (˚C)
151~251 models
301~601 models
80
90
90
100
2) Abnormal discharge pipe temperature
a) If the discharge pipe temperature rises to 105ºC (121ºC) or higher, the compressor is stopped [the outdoor unit’s
fan motor stops 1 minute (30 seconds) later. If the temperature drops to 80ºC or lower, the compressor recovers
automatically.
b) If the abnormal discharge pipe temperature occurs 2 (5) times in 60 minutes, or continues at 105º (121ºC) or
higher for 60 minutes, including when the compressor is stopped, the unit performs an abnormal stop (E36).
Note (1) If the abnormal discharge pipe temperature continues for 45 minutes from the time it first occurs and does not drop below 80ºC,
the compressor cannot be operated again.. (It can be reset using the remote control unit.)
(v)
Current safe control (FDCVA 151~251 models only)
1) If the current value input at the inverter inlet becomes higher than the set value, the compressor’s speed is reduced.
If the value continues to be higher than the set value even when the compressor speed is reduced, the speed is
reduced again.
2) If the problem continues for 3 minutes and the temperature drops below the cancellation value, this control ends and
the compressor begins speed protection release operation.
(vi) High pressure control
⽧
FDCVA 151~251 models
1) Heating
a) The compressor speed is reduced to control high pressure in accordance with the indoor heat exchanger tem-
perature (sensed by Thi-R) after the compressor starts.
Indoor heat exchanger
temperature (˚C)
Compressor speed (rps)
57 or more
52 or more
47 or more
less than 88
88 to less than 108
108 or more
Model
Item
FDCVA151~251
Retention
Compressor stops
Compressor operates
80
105 (121)
Discharge pipe temperature (˚C)
1) Compressor speed (Expansion valve) control
Note (1) Values in parenthesis show for the 301~601 models.
b) When the outdoor air temperature (sensed by Tho-A) is 17ºC or higher, the compressor’s speed is reduced and
the outdoor unit’s fan motor tap is changed to 2nd speed, in order to raise the high pressure under the heating
overload conditions. Furthermore, the upper limit of the compressor’s speed during control is 60 rps.
2) Cooling
a) When the temperature at the outdoor heat exchanger (sensed by Tho-R) and the outdoor air temperature (sensed
by Tho-A) is 41ºC or higher after the compressor starts, the compressor’s speed is reduced and the outdoor
unit’s fan motor tap is changed to high speed operation at 7th speed.
Indoor heat exchanger
temperature (˚C)
Compressor speed (rps)
58.5 or more
53.5 or more
48.5 or more
less than 88
88 to less than 108
108 or higher
Model
Item
FDCVA151~251
b) If the outdoor heat exchanger temperature (sensed by Tho-R) is sensed 5 times in 60 minutes during compres-
sor operation, or sensed continuously for 10 minutes, including when the compressor is stopped, an abnormal
stop is performed.
Indoor heat exchanger
temperature (˚C)
Compressor speed (rps)
65 or more
60 or more
55 or more
less than 88
88 to less than 108
108 or more
Model
Item
FDCVA151~251