Compressor Control - Panasonic U-72MF2U9 Service Manual

3. Compressor Control

3. Compressor Control

3-1. Compressors Mounted in the Outdoor Units
Type of outdoor unit
1st compressor
(High pressure rotary)
2nd compressor
(High pressure rotary)
* The inverter compressor is operated according to the load and does not operate beyond outdoor unit capacity.
Placement of compressor seen from the top
Type 72, 96
Front side
3-2. Compressor Selection Rules
3-2-1. Priority order of compressors
A. Decide first priority order of compressor in each outdoor unit.
The compressor that has no trip counter, shorter operating time and smaller number of compressor will be
taken first priority.
First priority order of inverter compressor in each outdoor unit > Other inverter compressor
B. Priority order of compressor trip counter = 0 is higher than that of compressor trip counter = 1.
C. Inverter compressor: Shorter operating time > Longer operating time
D. Compressor that "outdoor unit small address"
installed in outdoor unit
A First priority order of inverter compressor in each outdoor unit > Other inverter compressor
B
C
D
*1 Select first priority order of compressor in each outdoor unit by following method.
Inverter compressor
Inverter compressor
1st compressor
2nd compressor
Priority order flow of all compressors
Compressor trip counter =0 > Compressor trip counter =1
Shorter operating time > Longer operating time
"Outdoor unit small address"
installed in outdoor unit
Priority order flow of each outdoor unit
Compressor trip counter =0 > Compressor trip counter =1
Shorter operating time > Longer operating time
1st compressor > 2nd compressor
72 96
4.8 7.9
Type 120, 144
Front side
Compressor that "outdoor unit large address"
>
installed in outdoor unit
"Outdoor unit large address"
>
installed in outdoor unit
1 - 5
2WAY VRF SYSTEM
3WAY VRF SYSTEM
Control Functions
Control Functions
unit : kW
120 144
4.5 5.6
4.5 5.6
1st compressor
*1
1
2
3
4
5
6
7
8
9