Various Protections - Fujitsu ASU18RLF Service Instructions Manual

28. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL
The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.
When the discharge temperature becomes higher than Temperature
is decreased 10rps, and it continues to decrease the frequency for 10rps every 120 seconds until the
temperature becomes lower than Temperature .
When the discharge temperature becomes lower than Temperature
frequency is released.
When the discharge temperature becomes higher than Temperature
( Table 24 : Discharge temperature over rise prevension control / Release temperature )
AOU36RLXFZH
AOU45RLXFZ
2. CURRENT RELEASE CONTROL
The compressor frequency is controlled so that the outdoor unit input current does not exceeds
the current limit value 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.
3. COOLING PRESSURE OVER RISE PROTECTION
When the outdoor unit discharge pressure sensor rises to 580.2 psi
the compressor is stopped and error display is indicated.
Temperature Temperature
219°F (104°C) 214°F (101°C)
01-32
, the compressor frequency
,the control of the compressor
,the compressor stops.
Temperature
230°F (110°C)
(4 MPa) or greater,