Daikin REYQ8-48PY1B, Service Manual

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Protection Control SiBE37-701_B
137 Function
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.
★
In the case of multi-outdoor-unit system, each INV compressor performs these controls in
the following sequence.
[Inverter overcurrent protection control]
★
Perform the following control of integrated as well as multi units for each INV compressor.
Normal operation
&
Inverter current value
>14.7A
• Inverter current value<14.7A
• INV upper limit frequency=max (210Hz)
During the control of
inverter protection
INV Comp. upper limit
step: 1-step down
Inverter current value
>14.7A
• 10 seconds
Current status
maintained
Inverter current value
<14.7A
continues for 20 seconds
INV Comp. upper limit
step: 1-step up
Inverter current>16.1A continues for 260 seconds.
Inverter current standby
When occurring 4 times within 60 min.,
the malfunction code “L8” is output.