2. Outdoor
fan control
* Available control modes are 0 (at rest) to 63.
• The fan speed
corresponding to the highest
mode varies with the HP
capacity of the outdoor unit.
2.
Heating fan control
1)
Outdoor fan speed (mode) is controlled on the basis of measurements provided by
the TE1 temperature sensor.
2)
If TE1
> 25°C is continuously detected for 8 minutes, the fan may be turned off.
However, this condition is the same as normal
thermostat
OFF, so that fan
operation
will be restarted.
3)
For a specified period after air conditioner startup and during defrosting, this
control is disabled.
4)
When refrigerant is in extremely short supply, this control may cause the air
conditioner to be repeatedly turned on and off.
• The fan speed
corresponding to the highest
mode varies with the HP
capacity of the outdoor unit.
3. Capacity
control
1)
The compressors of the
outdoor
unit are controlled on the basis of
capacity
demand issued by indoor controllers.
2)
The two compressors featured in an outdoor unit operate on a rotational
basis, so that, every time they come to a stop, their order of startup changes.
Item
Description of operation, numerical data, and other information
Remarks
1.95
2.00
2.15
2.35
2.45
2.65
3.0
[Highest mode]
[Current mode + 1]
(Mode raised as rapidly
as every second)
[Current mode + 1]/50 seconds
[Hold]
[Current mode + 1]/75 seconds
(Mode raised up to 13)
(Mode 1 to highest)
[Current mode - 1]/50 seconds
Mode being lowered:
Highest mode - 1
→
1
Mode being raised: mode 0
→
1
[Current mode - 1]
(Mode lowered as rapidly as
every two seconds)
(down to mode 0)
Interval control
[Mode [0]: 180 seconds
Mode [1]: 30 seconds]
1.
Cooling fan control
1)
Outdoor fan speed (mode) is controlled on the basis of measurements provided by
the P
D
pressure sensor.
2)
For a specified period after the start of cooling operation, the
outdoor unit
controls
outdoor fan
speed (mode) on the basis of measurements provided by the
P
D
pressure sensor.
PD
pressure
25
8
6
4
2
Zone A: Lowest mode, timer count for forced compressor shutdown
Zone B: -2/15 seconds (down to lowest mode)
Zone C: -1/15 seconds (down to lowest mode)
Zone D: Hold (staying at current mode)
Zone E: +1/15 seconds (up to highest mode)
Zone F: Highest mode
TE1 temperature
(°C)
(MPa)
- 40 -