Panasonic S-160PE1R5B Technical Data & Service Manual page 145

1) Indoor Air Temperature Control
By the control method, not only the thermostat is switched on and off, as explained section "1. Indoor Air
Temperature Control ", but also the frequency of the compressor's inverter is controlled in accordance with
T and fluctuations in indoor air temperature. Inverter frequency is controlled as follows:
When T is high (not yet reached the temperature set
with the remote controller).
When T is low (approximately +1.0 or less in the
cooling mode or approximately -1.0 or more in the
heating mode).
2) Maximum and Minimum Frequency Control
The compressor's inverter frequency is controlled in accordance with the model and operation mode.
The maximum and minimum frequencies for each model are shown in the table below.
* There are cases in which frequency is limited with other control functions depending on operational conditions,
so operations are not always carried out in accordance with the maximum frequencies listed below.
· Maximum and Minimum Frequency
Maximum Frequency (Hz)
Minimum Frequency (Hz)
* There is a case in which the frequency set at maximum and minimum may sometimes decrease in accordance
with ambient temperature and indoor loads.
3) Current Control
The inverter frequency is controlled so that the current value for the inverter compressor is less than the figure
listed in the table below in order to prevent abnormal increases in the inverter circuit located within the outdoor
unit's electrical box.
Current control with primary current : The limited values are modified in accordance with ambient temperature.
U-160PZH2R5
Cooling
Is (A)
Heating
U-160PZH2R5
U-160PZH2R8
Cooling
60
Heating
65
Cooling
13
Heating
15
U-160PZH2R8
27.5 10.5
29.0 10.5
Controlled so that the inverter frequency is increased.
Controlled so that the inverter frequency is decreased
or kept.
U-180PZH2R8 U-200PZH2R8
70
80
13
15
U-180PZH2R8 U-200PZH2R8
11.5
11.5
4-3
U-224PZH2R8
70 80
95 100
13 13
15 15
U-224PZH2R8
12.5 14.0
15.0 16.5
4