Compressor Body Protection Control; Inverter Protection Control - Daikin REYQ-XA Service Manual

Protection Control
6.4

Compressor Body Protection Control

This compressor body protection control is used to protect the compressor internal temperature
against an error or transient increase of compressor body temperature.
Contents
The following control is performed for each compressor.
6.5

Inverter Protection Control

Inverter current protection control and radiation fin temperature control are performed to prevent
tripping due to an abnormality, or transient inverter overcurrent, and fin temperature increase.
In the case of multi-outdoor-unit system, each compressor performs these controls in the following
sequence.
Inverter overcurrent protection control
This control is performed for each compressor.
REYQ72-
Condition
120XATJU
A more than 47.0 A more than 22.0 A more than 16.8 A more than 67.5 A more than 34.0 A more than 25.5 A
B less than 45.6 A
C more than 50.0 A more than 25.0 A more than 17.3 A more than 72.0 A more than 38.0 A more than 26.0 A
121
Normal control
Compressor body
temperature > 108˚C
(226.4˚F)
Reduce compressor capacity step
Compressor body
temperature > 135˚C
(275˚F)
Compressor body temperature standby
Normal control
A
Reduce compressor capacity
Inverter current standby
REYQ72-
120XAYDU
less than 21.3 A less than 16.3 A
B
C
REYQ72- REYQ144/
120XAYCU 168XATJU
less than 65.5 A
When occurring 3 times within 100
minutes, the error code F3 is output.
(Sub code - 20, 21, 22)
When occurring 3 times within 60
minutes, the error code L8 is
output.
REYQ144/
168XAYDU
less than 33.0 A
Functions and Control
SiUS371901E
REYQ144/
168XAYCU
less than 24.7 A