Panasonic U-120ME2U9, Service Manual

Page: 18 / 206

2WAY VRF SYSTEM
Control Functions
1 - 10
1
2
3
4
5
6
7
8
9
3. Compressor Control
2WAY VRF SYSTEM
Control Functions
3. Compressor Control
Current protection
This restriction protects the compressor and controls the compressor electric current simultaneously.
The current limitation value changes to “normal status” and “overload status” according to the outdoor
temperature.
The primary and secondary current values of 1st compressor or 2nd compressor are measured.
114.8°F (46°C)
Outdoor temperature
109.4°F (43°C)
Outdoor temperature
3
Current table <Overload>
Current table <Normal>
A
A Normal status: Use the same values of 1st compressor and 2nd compressor.
unit: Ampere
Overload status: Use the same values of 1st compressor and 2nd compressor. B
B
Current limit 1
Maximum current 1 H
Primary
Maximum current 1 L 24
30 43 30 30
72 96 120 144
37
22.5
21.5 25 38 22.5
21.5
Current limit 2
Maximum current 2 H
Secondary
Maximum current 2 L 24
30 44 30 30
39
25
24 25 40 25
24
Type of outdoor unit
unit: Ampere
Current limit 1
Maximum current 1 H
Primary
Maximum current 1 L 24
30 43 30 30
72 96 120 144
37
21
20 25 38 21
20
Current limit 2
Maximum current 2 H
Secondary
Maximum current 2 L 24
30 44 30 30
39
23
22 25 40 23
22
Type of outdoor unit
Inverter layout
Noise
filter
R
S
T
U
V
W
U
V
W
U
V
W
R
S
T
Power
supply
Primary CT1
Primary CT2
Secondary CT1
Secondary CT2
Diode
bridge
IPM (CM)
1st compressor
Fan motor
Noise
filter
Diode
bridge
IPM (CM)
IPM (FN)
2nd compressor
U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9
2WAY VRF SYSTEM
Control Functions
3. Compressor Control
Inverter layout
Noise
filter
R
S
T
U
V
W
U
V
W
U
V
W
R
S
T
Power
supply
Primary CT1
Primary CT2
Secondary CT1
Secondary CT2
Diode
bridge
IPM (CM)
1st compressor
Fan motor
U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94
Use the same values of 1st compressor and 2nd compressor.
unit: Ampere
Current limit 1
Maximum current 1 H
Primary
Maximum current 1 L 15.5
19.5 19.5 19.5 19.5
72 96 120 144
15.5
16.5
15.5 16.5 16.5 16.5
15.5
Current limit 2
Maximum current 2 H
Secondary
Maximum current 2 L 13.1
16.6 23.0 16.6 16.6
19.5
14.1
13.1 14.1 20.5 14.1
13.1
Type of outdoor unit
Noise
filter
Diode
bridge
IPM (CM)
IPM (FN)
2nd compressor
SM830237-07_北米向け2WAY_VRF.indb 10 18/06/19 18:55:31