Specifications

SiBE341027 Detailed Control Functions

Function 55

2.5.4 Inverter Protection Control

Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to

an error, or transient inverter overcurrent, and fin temperature increase.

[Inverter overcurrent protection control]

In the case of multi-outdoor-unit system, each INV. compressor performs these controls in the following sequence.

[Inverter fin temperature control]

In the case of multi-outdoor-unit system, each INV. compressor performs these controls in the following sequence.

INV. Comp.: 1 step down INV. Comp.: 1 step up

• INV. current value > 26.5 A

• After 15 sec.

INV. current value > 27.6A continues for

260 seconds.

Restart standby

(3 times per 60 min. at max.)

4 times per 60 min.

INV. current value < 26.5 A

continues for 20 sec.

Stop due to error

L8" displayed)

Normal operation

• Inverter current value < 26.5 A

• INV. upper limit frequency = max (210 Hz)

Inverter current value

>26.5A

INV. Comp.: 1 step down INV. Comp.: 1 step up

• Tfin > 84˚C

• After 15 sec.

Tfin > 98˚C

Restart standby

(3 times per 60 min. at max.)

4 times per 60 min.

Normal operation

Tfin > 84˚C

• Tfin < 81˚C

• INV upper limit frequency = max (210 Hz)

Tfin < 81˚C

continues for 3 min.

(Without preconditions)

Current step maintenance

Stop due to error

L4" displayed)