Panasonic CU-8ME1XPK - Page 450

PACD011001C2 Outline of Control
Function UM Combination “MA1R Series” Using R-407C 429
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When condition (Th6 – Te < 5) remains for 3 continuous minutes in steps higher than step 1-2, EVs of
all indoor units in thermostat-OFF status are set to 200 pls. This is canceled when Th6 – Te > 15. (for
prevention of wet operation in cooling operation when outside temperature is low)
Th6 – Te: Suction pipe temperature – Evaporation temperature
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From 24 HP model or higher, the fan (M12F) on the inverter box side stops if operating at fan tap (3) or
lower. Therefore, Tfin switches M11F OFF and M12F ON.
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In this control, the compressor load increase based on PI calculation is conducted once every 2
minutes. The load decrease operation is conducted once every 20 minutes.
∗
Tfin: Inverter fin temperature.
3.1.5 Compressor Capacity Control
INV Compressor Operating Frequency
The operating frequency changes in the following steps.
 ®¬ O
M11F : H / L / OFF
M12F : OFF
M11F : OFF
M12F : ON
T fin > 87˚C
T fin < 67˚C
(V0820)
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PA-16·18·20MA
„
PA-24~30MA
NO.
Frequency
NO.
Frequency
INV STD INV STD1 STD2
1 29Hz OFF 1 29Hz OFF OFF
2 31Hz OFF 2 31Hz OFF OFF
3 33Hz OFF 3 33Hz OFF OFF
4 35Hz OFF 4 35Hz OFF OFF
5 37Hz OFF 5 37Hz OFF OFF
6 39Hz OFF 6 39Hz OFF OFF
7 41Hz OFF 7 41Hz OFF OFF
8 43Hz OFF 8 43Hz OFF OFF
9 46Hz OFF 9 46Hz OFF OFF
10 48Hz OFF 10 48Hz OFF OFF
11 52Hz OFF 11 52Hz OFF OFF
12 55Hz OFF 12 55Hz OFF OFF
13 58Hz OFF 13 58Hz OFF OFF
14 62Hz OFF 14 62Hz OFF OFF
15 64Hz OFF 15 64Hz OFF OFF
16 67Hz OFF 16 67Hz OFF OFF
17 71Hz OFF 17 71Hz OFF OFF
18 75Hz OFF 18 75Hz OFF OFF
19 37Hz ON 19 37Hz ON OFF
20 41Hz ON 20 41Hz ON OFF
21 46Hz ON 21 46Hz ON OFF
22 52Hz ON 22 52Hz ON OFF
23 58Hz ON 23 58Hz ON OFF
24 64Hz ON 24 64Hz ON OFF
25 71Hz ON 25 71Hz ON OFF
26 79Hz ON 26 41Hz ON ON
27 52Hz ON ON
28 64Hz ON ON
29 79Hz ON ON