Daikin REYQ-AATJA, Service Manual

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Protection Control SiUS372201EA
143 Part 4 Functions and 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.
This control is performed for each compressor.
Inverter overcurrent protection control
Condition REYQ72AATJA
REYQ96/120AATJA REYQ144/168AATJA REYQ192/216/240AATJA
M1C M2C M1C M2C M1C M2C
A more than 49.0 A more than 30.5 A more than 30.5 A more than 30.5 A more than 49.0 A more than 49.0 A more than 49.0 A
B less than 48.3 A less than 29.4 A less than 29.4 A less than 29.4 A less than 48.3 A less than 48.3 A less than 48.3 A
C more than 51.0 A more than 32.5 A more than 32.5 A more than 32.5 A more than 51.0 A more than 51.0 A more than 51.0 A
N ormal control
In v erter c u rrent stand b y
Red u ce compressor capacity
A B
W hen occ u rring 3 times w ithin 60
min u tes, the error code L 8 is
o u tp u t.
C
Condition REYQ72AAYDA
REYQ96/120AAYDA REYQ144/168AAYDA REYQ192/216/240AAYDA
M1C M2C M1C M2C M1C M2C
A more than 28.0 A more than 19.0 A more than 19.0 A more than 19.0 A more than 28.0 A more than 28.0 A more than 28.0 A
B less than 27.2 A less than 18.2 A less than 18.2 A less than 18.2 A less than 27.2 A less than 27.2 A less than 27.2 A
C more than 30.0 A more than 21.0 A more than 21.0 A more than 21.0 A more than 30.0 A more than 30.0 A more than 30.0 A