-
40
-
ii) High dilution operation prevention control
If any of the following conditions is established, operation changes to forced heating operation in item iii).
Conditions
1
30 minutes have passed since the power was turned ON.
2
SW8-2 (Compressor dilution timer cancel) is ON.
iii) Forced heating operation
1
In the heating mode, the speed is set at the starting speed in compressor protective start I, 42 rps, and at
this time, the speed is increased by 6 rps every 30 seconds.
2
2 minutes after starting, operation is in accordance with the target speed, but if the compressor stops
during this control (including when the remote control is used to turn it OFF), this control is repeated.
3
After 10 minutes, control is switched to low speed operation control in item iv).
iv) Low speed operation control (Cooling, Dehumidifying mode)
1
Compressor protective start I is implemented at the following compressor speeds and times.
Specified speed: 20 rps, Time: 10 min.
Note (1) During this control, if the compressor is stopped using a remote controller, etc., this control is repeated.
2
This control ends after 10 minutes of operation.
3
If the conditions of the following are established, it is judged that the service valve is
closed and abnormal stop occurs (E49).
●
When the low pressure sensor (LPT) measures 0.079 MPa or lower continuously for 15 seconds.
v) High dilution operation prohibition control (Heating mode)
If any of the following conditions is established, control changes to the low speed operation control in item vi).
●
30 min. has passed since the power was turned ON.
●
SW8-2 is ON (for emergency measures)
vi) Low speed operation control (Heating mode)
1
Compressor protective start I is implemented at the following compressor speeds and times.
Specified speed: 42 rps, Time: 10 min.
Note (1) During this control, if the compressor is stopped by the remote controller, etc., this control is repeated.
2
This control is stopped after 10 minutes of operation.
3
If the high pressure switch (63H1) is turned OFF, it is judged that the operation valve is closed and an
abnormal stop (E40) occurs.
(d)
Outdoor unit fan control
( i ) Contents of fan tap and fan motor control during control
FM
01
850
810
740
600
400
200
FM
01
870
760
650
500
350
200
Unit: min
-1
Model
Fan tap
302 series
6th speed
5th speed
4th speed
3th speed
2th speed
1th speed
Cooling
Heating
(ii) Fan tap control when started
1) During heating and defrosting fan control
a) The outdoor unit’s fan is started in 4th speed simultaneously with the start of compressor operation.
b) After 20 seconds of operation in 4th speed, outdoor fan control in item (iii) is executed.
2) During cooling, dehumidifying
a) When the outdoor air temperature (Tho-A) is 20
°
C or higher, the outdoor unit fan starts simultaneously with the
compressor. The fan tap runs in 4th speed when starting and after 20 seconds, outdoor unit fan control in item
(iii) is executed. (Normal control)
b) When the outdoor air temperature (Tho-A) is lower than 20
°
C, the outdoor unit fan starts 10 seconds after the
compressor starts. The fan tap runs in 3rd speed when starting and after 20 seconds, outdoor unit fan control in
item (iii) is executed.
c) When the outdoor air temperature (Tho-A) is lower than 10
°
C, the outdoor unit fan starts 10 seconds after the
compressor starts. The fan tap runs in 2nd speed when starting and after 20 seconds, outdoor unit fan control in
item (iii) is executed.
d) When the outdoor air temperature (Tho-A) is less than –5
°
C, the outdoor unit fan starts 10 seconds after the
compressor starts. The fan tap runs in 1st speed when starting and after 20 seconds, outdoor unit fan control in
items (iii) and (iv) is executed.
