GE AB09SC2VHA Service Manual Download

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INTRODUCTION

ENGLISH

A-7

Functions and Control

Heat Mode

• Temperature control range: 60-86°F
•

Temperature difference: ±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 off, 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 airflow 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 satisfied, 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 finishes, 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

off, the compensation will be erased.

Timing

You can set 24 hours on/off timing. After setting, the timing
indicator will be displayed. Also, the light will turn off 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 off when the timing is finished 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 off and the system
will turn off. If you have set the dormant functions, the

order of your settings will be operated according to the
timing settings.

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

airflow and the low airflow will be turned to the set speed
airflow.

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 Conflict

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 off.