Mitsubishi Electric QAHV-N560YA-HPB Service Handbook page 114

[ VII Control ]
Bypass Control
-5- Outdoor unit fan
The fan's rotation speed will be controlled to approximate the values in the table below that are obtained based on the outside
temperature and the low pressure.
(Pressures and temperatures will be monitored, and the fan frequency will change accordingly in three steps.)
Fan rotation
speed (rpm)
230
258
291
328
371
413
455
Compressor Frequency Control
-6- Injection LEV
Operating range of the LEV
Opening range: 50-480 (fully open)
LEV operation speed
30.7 pulse/sec
Open
Close 30.7 pulse/sec
At startup
For five minutes after startup, the valve will be fixed to Initial Setting.
During operation
After five minutes have elapsed after startup, LEV2 (Injection LEV) opening will be regulated at 60-second intervals to bring
the high pressure to the target pressure.
-7- LEV in the main circuit
Operating range of the LEV
The opening range of the LEV is between 60 and 480 (fully open).
LEV operation speed
30.7 pulse/sec
Open
Close 30.7 pulse/sec
At startup
For one minute and thirty seconds after startup, the valve will be fixed to the Initial Setting.
During operation
Ninety or more seconds after startup, the LEV opening will be controlled every 30 seconds according to the changes in com-
pressor frequency, pressure, and temperature.
The LEV will be controlled to keep the shell bottom SH in the range between 15 and 25K.
HWE1517A
Outdoor temp.(A) Fan rotation
(°C) speed (rpm)
39 < A
36 < A ≤ 39
33 < A ≤ 36
30 < A ≤ 33
27 < A ≤ 30
24 < A ≤ 27
21 < A ≤ 24
Outdoor temp.(A)
(°C)
498 18 < A ≤ 21
540 12 < A ≤ 18
600 10 < A ≤ 12
650 5 < A ≤ 10
750 3 < A ≤ 5
800 - 3 < A ≤ 3
830 A ≤ - 3
- 107 -
GB