Compressor Control - Sanyo 2-WAY ECO-i SPW-C0705DXHN8 Service Manual

3. Compressor Control

3-1. Compressors Mounted in the Outdoor Units
[SPW-C0705DXHN8, C0905DXHN8, C1155DXHN8, C1305DXHN8, C1405DXHN8]
Compressor 1
Installed
Compressor 2
compressor
1
Compressor 3
* For both 50 Hz and 60 Hz.
INV
Compressor 1
Type 705
3-2. Compressor Selection Rules
In cooling mode, all inverter compressors in the outdoor units are designed to operate simultaneously. All the
inverter compressors will stop at a time when the outdoor is stopped accordingly. Constant-speed compressors
run in order of the shortest amount of operating time. In heating mode, the inverter compressor with the shortest
amount of operating time runs at first followed by the compressors in order of the shortest amount of operating
time including inverter units.
* Immediately after installation, all compressors have an operating time of zero. In this case, the compressors
start in the following sequence: Inverter compressor > Constant-speed compressor 1 > Constant-speed com-
pressor 2.
Examples of accumulated operating time: ODU=Outdoor Unit
Suppose the following tentative system.
Comp 1
Comp 2
Comp 3
Compressor Selection Sequence in Cooling Mode:
All the inverter compressors are firstly selected simultaneously .
Comp 1
Comp 2
Comp 3
Capacity
DC Inverter
Rotary
Scroll
Scroll
Compressor 2
ODU 1 ODU 2
100 hrs. 70 hrs.
150 hrs. 160 hrs.
110 hrs. 80 hrs.
ODU 1 ODU 2
1st 1st
6th 7th
5th 3rd
705* 905
DC Inverter DC Inverter
––– 5 hp
––– –––
Constant
INV
speed
Compressor 1
Types 905, 1155
OUD 3
140 hrs.
40 hrs.
90 hrs.
OUD 3
1st
2nd
4th
1 - 4
W-2WAY ECO-i SYSTEM
Control Functions
1155 1305
DC Inverter DC Inverter
6 hp 5 hp
5 hp
–––
hp = horsepower
Constant
Constant
INV
speed
speed
Compressor 3
Compressor 2
Compressor 1
Types 1305, 1405
1405
6 hp
6 hp