Inverter Protection Control - Daikin RXYQ96PYDN Service Manual

Protection Control
8.4

Inverter Protection Control

Inverter current protection control and inverter fin temperature control are performed to prevent
tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase.
[Inverter overcurrent protection control]
Inverter current value
>14.7A (460V)
26.5A (230A)
During the control of
inverter protection
10 seconds
Inverter current value
<14.7A (460V)
26.5A (230V)
continues for 20 seconds
68
In the case of multi-outdoor-unit system, each INV compressor performs these controls in the
following sequence.
Perform the following control of integrated for each INV compressor.
Normal operation
INV Comp. upper limit
step: 1-step down
Current status
maintained
INV Comp. upper limit
step: 1-step up
Inverter current>16.1 (460V) continues for 260 seconds.
Inverter current standby
Inverter current value<14.7A (460V)
&
INV upper limit frequency=max (210Hz)
Inverter current value
>14.7A (460V)
26.5A (230V)
31 (230V)
When occuring 4 times within 60 min.,
the malfunction code [L8] is displayed.
SiUS34-801A_b
26.5A (230V)
VRVIII R-410A Heat Pump 60Hz