Compressor Control - Panasonic U-8ME1E81 Service Manual

3. Compressor Control

3-1. Compressors Mounted in the Outdoor Units
Outdoor unit Capacity
Compressor 1
Installed
Compressor 2 Constant speed Scroll
compressor
Compressor 3 Constant speed Scroll
1
Top view
8 HP
Inverter 10HP
1 6
Constant speed 6HP
3-2. Compressor Selection Rules
3-2-1. Priority order of inverter compressor and constant speed compressor
Priority order of inverter compressor is higher than that of constant speed compressor.
* However, when the inverter compressor stops because of protection control or forced stop etc., a constant
speed compressor operates while the inverter compressor has stopped.
3-2-2. Priority order of inverter compressors
The priority order of the inverter compressor with the least operating time is high.
* The comparison is made among inverter compressors other than ones stopped because of protection control or
forced stop.
3-2-3. Priority order of constant speed compressors
The priority order of Compressor 2 is higher than that of Compressor 3.
3-2-4. Priority order between Compressors 2, priority order between Compressors 3
Priority order of Compressor 2 and Compressor 3 with the least operating time is high.
* The comparison is made among constant speed compressors other than ones stopped because of protection
control or forced stop.
DC Inverter Rotary
10HP
Inverter 10HP
H P
Inverter 10HP
Constant speed 5HP
8 HP 10 HP
10 HP 10 HP
– –
– –
12 HP
Constant speed 6HP
1 8 H P
Inverter 10HP
Constant speed 5HP
1 - 4
2WAY SYSTEM
Control Functions - Outdoor Unit
12 HP 14 HP 16 HP 18 HP 20 HP
6 HP 10 HP 10 HP 10 HP 10 HP
6 HP 5 HP 6 HP
– – –
14 HP
Inverter 6HP
Constant speed 5HP
2 0 H P
Inverter 10HP
Constant speed 6HP
Constant speed 6HP
5 HP 6 HP
5 HP 6 HP
Inverter 10HP