Installation and Maintenance Manual

VRF-SVX31A-EN 27
Configuration
Figure 5. Heat recovery unit operating in auto-changeover mode
9
Time required for mode change
Note: Applies only when digit 3 is set to “1” (auto-
changeover mode is enabled).
0: 5 minutes
1: 7 minutes
2: 9 minutes
3: 11 minutes
4: 13 minutes
5: 15 minutes
6: 20 minutes
7: 30 minutes
10
Compensation option for height or pipe length difference
between indoor units
0: Use default value
1: Use when height or pipe length difference is as
specified in Note 1.
2: Use when height or pipe length difference is as
specified in Note 2.
Notes:
1. Height difference between the indoor unit being configured and the lowest indoor unit is > 98.4 ft (30 m), or 
pipe length difference between the outdoor unit and the furthest indoor unit and the outdoor unit and the indoor unit being configured is > 360.9 ft
(110 m).
2. Height difference between the indoor unit being configured and the lowest indoor unit is 49.2–98.4 ft (15–30 m), or 
pipe length difference between the outdoor unit and the furthest indoor unit and the outdoor unit and the indoor unit being configured is 164–
360.9 ft (50–110 m). 
Example: If the unit being configured is 60 ft away from the outdoor unit, and the furthest in door unit is 300 ft from the outdoor unit, the pipe
length difference is 240 ft (300-60=240), so Digit 10 should be set to “2.”
Table 2. Option setting mode: Digit 2 = 5
Display
screen
(mode and
On/Off)
Digit
Option description Set digit to...
A : Set with digit 4.
B : Set with digit 5.
C : Set with digit 6.
D : Set with digit 8.
Cooling Off
Heating Off
Cooling On
Heating On
Ts
C
A
Temp.
D
B
Standard temp.
for Heating
Standard temp.
for Cooling
Standard temp. for
Heating
 Cooling
Standard temp.
for Cooling

Heating
Set temp.
for Auto mode
Note: Minimum compressor off time for heating or cooling is set by digit 9.