Installation and Maintenance Manual

VRF-SVN33A-EN 39
Control System
Table 20. Configuration using DIP switches K9–K12
DIP switch Setting Function description
Night-time silent mode
(a)
(a) Reduces fan speed for quiet operation.
K9 On
Disable
K10 On
K9 On Mode 1
3 ton: 600 rpm
4 ton: 600 rpm
5 ton: 620 rpm
K10 Off
K9 Off Mode 2
3 ton: 540 rpm
4 ton: 540 rpm
5 ton: 560 rpm
K10 On
K9 Off Mode 3
3 ton: 480 rpm
4 ton: 480 rpm
5 ton: 500 rpm
K10 Off
Heating capacity correction
(b)
,
(c)
,
(d)
,
(e)
(b) Maintaining factory default status is recommended. However, if the desire is to reduce energy consumption or improve
heating performance, control the operation according to the surrounding environment.
(c) As the target high pressure is decreased, energy consumption and noise may decrease but the indoor air discharge
temperature will also decrease.
(d) Heating operation increases frequency when the current high pressure is higher than the target high pressure; and vice
versa.
(e) If the target high pressure is high, the discharge air temperature of an indoor unit will increase, but energy consumption
will also increase.
K11 On
Default: 426.7 psi
K12 On
K11 On
Default – 28.4 psi
K12 Off
K11 Off
Default – 14.2 psi
K12 On
K11 Off
Default + 14.2 psi
K12 Off