Inverter Protection Control - Daikin VRV III REYQ8PY1 Service Manual

Si37-701
4.4

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
During the control of
inverter protection
10 seconds
Inverter current value
<14.7A
continues for 20 seconds
INV Comp. upper limit
Function
In the case of multi-outdoor-unit system, each INV compressor performs these controls in
the following sequence.
Perform the following control of integrated as well as multi units for each INV compressor.
Normal operation
INV Comp. upper limit
step: 1-step down
Current status
maintained
step: 1-step up
Inverter current>16.1A continues for 260 seconds.
Inverter current standby
Inverter current value<14.7A
&
INV upper limit frequency=max (210Hz)
Inverter current value
>14.7A
When occuring 4 times within 60 min.,
the malfunction code "L8" is output.
Protection Control
129