Fujitsu AOU18RLQ Service Manual

21. VARIOUS PROTECTIONS
(1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL
The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.
ASU15RLQ 219°F(104°C) 214°F(101°C) 230°F(110°C)
ASU18RLQ 219°F(104°C) 214°F(101°C) 230°F(110°C)
ASU15/18RLQ
ASU15/18RLQ
4.5A / 4.0A
6.0A / 5.5A
8.5A / 8.0A
When the discharge temperature becomes higher than Temperature ,the compressor frequency
is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until
the temperature becomes lower than Temperature .
When the discharge temperature becomes lower than Temperature ,the control of the control of the
compressor frequency is released.
When the discharge temperature becomes higher than Temperature ,the compressor is stopped
and the indoor unit LED starts blinking.
(Table 15 : Discharge Temperature Over Rise Prevension Control / Release Temperature)
Temperature
Temperature
Temperature
ASU15RLQ Ta+165°F (74°C)
Ta+165°F (74°C)
Ta+160°F (71°C)
Ta+160°F (71°C)
Ta+176°F (80°C)
Ta+176°F (80°C)ASU18RLQ
Temperature
Temperature
Temperature
(2). CURRENT RELEASE CONTROL
The compressor frequency is controlled so that the outdoor unit input current does not exceeds
the current limit velue that was set up with the outdoor temperature.
The compressor frequency returns to the designated frequency of the indoor unit at the time
when the frequency becomes lower than the release value.
(Table 16 : Current Release Operation Value / Release Value)
[ Heating ]
[ Cooling / Dry ]
OT : Outdoor Temperature
OT : Outdoor Temperature
05-17
7.0A / 6.5A
9.0A / 8.5A
10.5A / 10.0A
12.0A / 11.5A
OT (Control / Release)
63°F(17°C)
54°F(12°C)
41°F(5°C)
115°F(46°C)
104°F(40°C)
OT (Control / Release)
*Outside temperature is E/F zone with
within start 20 minutes in cooling mode.

Fujitsu AOU18RLQ Specifications

General

Brand	Fujitsu
Model	AOU18RLQ
Category	Air Conditioner
Language	English