Service Manual

INTRODUCTION
A-7
ENGLISH
Functions and Control
Heat Mode
• Temperature control range: 60-86°F
• Temperaturedierence:±2°F
Control feature: the temperature compensation is
automatically added and the system will send the heating
signals to the outdoor system.
IfTr≤Ts,theoutdoorcompressoristurnedon,theindoorfan
will be at the cold air proof mode.
IfTr>Ts+,theoutdoorsystemisturnedo,theindoorfanwill
be at the heat residue sending mode.
IfTr<Ts+,theoutdoorsystemwillbeturnedonagain,the
indoor fan will be in the cold air proof mode.
Indoor Fan Control
Manual Control: You can choose high, medium, low and
automatic speed control. Automatic:
When Tr<Ts, high speed.
WhenTs≤Tr≤Ts+4°F,mediumspeed.
WhenTr>Ts+4°F,lowspeed.
Whentheairowspeedhasnodelayfromthehightolow
switching, the speed should be delayed for 3 minutes (remain
at high speed for 3 minutes.) before the next switch.
• Louver location control: the location for the louver can be
set according to your needs.
Cold Air-Proof Operation
1. The indoor operation within 4 minutes after the start up is
as the following diagram, the air speed can be raised only
after the speed has reached a certain level.
• Residue heat sending. The indoor fan will send the residue
heat at a low speed for 12 seconds.
• Ifotherconditionsaresatised,whenthecompressorstops,
the indoor system will operate at a light speed. The indoor
fan will stop when the coil temperature is below the heat
start temp 4’.
• Defrosting. When the system receives the defrosting signal
from outdoors, the indoor fan will stop and the indoor
temperature display won’t change. At this time, any indoor
coil malfunctions will be neglected. When the outdoor
defrostingnishes,thecoilmalfunctionwillstillbeneglected
until the compressor has been started up for 30 seconds.
The indoor temperature display will not change and the
system operates at the cold air proof mode.
• Automatic heating temperature compensation: when
the system enters the heating mode, the temperature
compensation (4) will be added. When the status is switched
o,thecompensationwillbeerased.
Timing
Youcanset24hourson/otiming.Aftersetting,thetiming
indicatorwillbedisplayed.Also,thelightwillturnoafterthe
timing is set. The followings are several timing methods:
1. SystemONtiming:Thetimingindicatorwillbedisplayed
and the indoor system is under the waiting mode. The light
willbeturnedowhenthetimingisnishedandtherest
of the system will operate under a normal condition. The
timing starts since the last reception of the timing signal.
2. System /OFF timing: When the system is turned on, the
timing indicator will be displayed; the rest of the system
will operate under normal conditions. When the set time
expires,theindicatordisplaywillturnoandthesystem
willturno.Ifyouhavesetthedormantfunctions,the
order of your settings will be operated according to the
timing settings.
3. SystemON/OFFtiming:Thesettingswillbecompleted
according to the settings.
2. 4 minutes after the start up of the indoor fan, the light
airowandthelowairowwillbeturnedtothesetspeed
airow.
3. In the cold air proof operation, the fan won’t stop after the
start up.
4. During the cold air proof operation, the indoor system
will continuously send ‘indoor high speed’ signals to the
outdoor system.
Indoor System Mode Conict
The indoor unit is trying to operate in a mode that is opposite
of the mode the outdoor unit is currently operating in. Change
the operating mode to either heat or cool, or the indoor unit
willshuto.