Daikin EWAQ021BAW - Inverter Fin Temperature Control; Inverter Overcurrent Protection Control; Inverter Protection Control

Protection Control ESIE11-05
56 Functional Description
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 EW*Q040BA, 050BA, 064BA, each INV compressor performs these controls in
the following sequence.
[Inverter overcurrent protection control]
[Inverter fin temperature control]
Normal operation
Under inverter current
protection control
Inverter current >14.7A(Y1, YL)
Inverter current standby
Inverter current <14.7A(Y1, YL)
INV upper limit frequency = max
Inverter current > 16.1A(Y1, YL) continues for 260 sec.
&
• When occurring 4 times within 60 min.,
the malfunction code “L8 ” is output.
Tfin>84°C
Fin temp. standby
Tfin<81°C
INV upper limit rps = max
Under fin temperature
protection control
&
Tfin>93°C
• When occurring 4 times within 60 min.,
the malfunction code “L4” is output.
Normal operation