Inverter Protection Control - Daikin VRV EMERION REYQ-AATJA Service Manual

Protection Control
6.4

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
This control is performed for each compressor.
Overcurrent
Protection
Control
REYQ72AATJA
Condition
REYQ72AATJB
A more than 49.0 A
B less than 48.3 A
C more than 51.0 A
REYQ72AAYDA
Condition
REYQ72AAYDB
A more than 28.0 A
B less than 27.2 A
C more than 30.0 A
163
Normal control
A
Reduce compressor capacity
Inverter current standby
REYQ96/120AATJA
REYQ96/120AATJB
M1C M2C
more than 30.5 A more than 30.5 A
less than 29.4 A less than 29.4 A
more than 32.5 A more than 32.5 A
REYQ96/120AAYDA
REYQ96/120AAYDB
M1C M2C
more than 19.0 A more than 19.0 A
less than 18.2 A less than 18.2 A
more than 21.0 A more than 21.0 A
B
C
When occurring 3 times within 60
minutes, the error code L8 is
output.
REYQ144/168AATJA
REYQ144/168AATJB
M1C M2C
more than 30.5 A more than 49.0 A
less than 29.4 A less than 48.3 A
more than 32.5 A more than 51.0 A
REYQ144/168AAYDA
REYQ144/168AAYDB
M1C M2C
more than 19.0 A more than 28.0 A
less than 18.2 A less than 27.2 A
more than 21.0 A more than 30.0 A
SiUS372201EB
REYQ192/216/240AATJA
REYQ192/216/240AATJB
M1C M2C
more than 49.0 A more than 49.0 A
less than 48.3 A less than 48.3 A
more than 51.0 A more than 51.0 A
REYQ192/216/240AAYDA
REYQ192/216/240AAYDB
M1C M2C
more than 28.0 A more than 28.0 A
less than 27.2 A less than 27.2 A
more than 30.0 A more than 30.0 A
Part 4 Functions and Control