Fujitsu AB*G14LVTA Service Instructions

01-31
4. COOLING PRESSURE OVER RISE PROTECTION
When the outdoor unit heat exchange sensor temperature rises to 70.5 3°C) or greater,
the compressor is stopped and error display is indicated.
5. HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE )
On heating mode, the compressor frequency is controlled as following based on the
detection value of the indoor heat exchanger temperature sensor.
(Fig 22 : Heating Overload Protection Control)
7. COMPRESSOR TEMPERATURE PROTECTION
Compressor temperature sensor is monitoring the compressor temperature.
When the compressor temperature sensor detects higher than Temperature ,
the compressor is stopped.
6. HIGH PRESSURE PROTECTION
(1) When the pressure switch becomes OFF (Open : higher than 4.2 MPa),
the compressor is stopped.
It is released when the pressure switch becomes ON (Close : lower than 3.2 MPa)
after 3 minutes of compressor stop.
(2) When the pressure switch is opened for 10 seconds from power on, all of outdoor unit operation is stopped.
The outdoor unit will start up if the pressure switch is returned to ON after 10 seconds has passed.
When 10 minutes (Cooling) or 3 minutes (Heating) has passed from the compressor stop and
pressure switch becomes ON, protection is released and the compressor will restart.
110°C
125°C
80°C
+
AO*G30LAT4
Temperature
Temperature
When 3 minutes has passed from the compressor stop and the compressor temperature sensor detects
lower than Temperature , protection is released and the compressor will restart.
+
-
AO*G18/ 24LAT3
Indoor heat exchange
temperature
63°C
Compressor is OFF
The compressor frequency is
decreased 10rps every 20 seconds.
56°C
54°C
A°C
B°C
Outdoor heat exchange
tempreture
-9°C
Stable range
Release
=
<
Th
-11°C
=
<
Th
< -9°C
-13°C
=
<
Th
< -11°C
-15°C
=
<
Th
< -13°C
Th
< -15°C
In one operation of
the indoor unit
: Qu air than
All indoor unit
opeate,
: Qu air
52°C
52°C
52°C
50°C
48°C
50°C
50°C
48°C
46°C
44°C
48°C
48°C
48°C
48°C
48°C
46°C
46°C
46°C
46°C
46°C
A°C A°CB°C B°C
The compressor frequency is
decreased 6rps every 60 seconds.
The compressor frequency is
decreased 2rps every 60 seconds.
Release

Fujitsu AB*G14LVTA Specifications

General

Brand	Fujitsu
Model	AB*G14LVTA
Category	Air Conditioner
Language	English