Daikin ERQ - Inverter Protection Control

Protection Control ESIE09-05
36 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.
[Inverter overcurrent protection control]
[Inverter fin temperature control]
Not limited
Limited
Inverter current >12A
Inverter current
Inverter current ≥ 13.1A continues for 260 sec.
>12A
•Inverter current ≤ 12A
• INV upper limit frequency=max Hz
&
•10 sec.
•Matching of frequency
&
• When occurring 4 times within 60 min.,
the malfunction code "L8 " is output.
INV upper limit frequency:
1-step down from current
compressor frequency
INV upper limit frequency:
1-step up from current
compressor frequency
Inverter current
standby
Inverter current ≤ 12A
continues for 3 min.
Status quo
Without conditions
Not limited
Limited
Tfin≥79˚C
Tfin≥79˚C
Tfin≥84˚C
Fin temp. standby
• Tfin<76 ˚C
• INV upper limit frequency=max Hz
&
• When occurring 4 times within 60 min.,
the malfunction code "L4" is output.
INV upper limit frequency:
1-step down from current
compressor frequency
• 10 sec.
• Macthing of frequency
&
Tfin≤76˚C
continues for 3 min.
INV upper limit frequency:
1-step up from current
compressor frequency
Status quo
Without conditions
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