Mitsubishi Electric MSZ-A09RV-E1 Service Manual page 33

9-10. Operational frequency control of outdoor unit
1. Outline
The operational frequency is decided by following the procedures below:
First, set the target operational frequency based on the difference between the room temperature and the set temperature.
Second, regulate the target operational frequency by discharge temperature protection, high pressure protection, electric
current protection and overload protection and also by the maximum/minimum frequency.
(1) maximum/ minimum frequency in each operation mode.
COOL (indoor fan speed : Hi)
Model Minimum
frequency
MSZ-A09RV 15
MSZ-A12RV 15
w The maximum frequency in COOL mode is limited according to operation hours, as shown below.
Maximum
frequency
frequency
1Hr
(2) Frequency change speed
During increasing frequency
Operational frequency
10Hz to 14Hz
15Hz to 79Hz
80Hz to 150Hz
During decreasing frequency
Operational frequency
10Hz to 42Hz
43Hz to 150Hz
Rating Maximum
frequency frequency
53 80
82 88
Rating or under-rating frequency
Time
MUZ-A09RV-
MUZ-A09RV-
HEAT
Minimum Rating
frequency frequency
16 67
16 98
MUZ-A12RV-
E1 E1
0.5 sec./Hz
5 sec./Hz
0.5 sec./Hz
MUZ-A12RV-
E1 E1
1 sec./Hz
0.5 sec./Hz
33
Maximum DRY
frequency
98 22/27
115 22/27