Current release value shift control, Over-current protective control, High-pressure sw control – Toshiba CARRIER RAV-SP300AT2-UL User Manual

Page 36: Auto restart

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7. Current release value shift control

1) This control purposes to prevent troubles of

the electronic parts such as the compressor

driving elements and the compressor during

cooling operation.

2) The current release control value (


1) is

selected from the following table according

to TO sensor value.

Current release control value (I1)


8. Over-current protective control

1) When the over-current protective circuit detected an abnormal current, stop the compressor.
2) The compressor restarts after 2 minutes 30 seconds as setting [1] as an error count.
3) When the error count [8] was found, determine an error and restart operation is not performed.
4) For the error display contents, confirm on the check code list.

9. High-pressure SW control

1) The operation frequency is controlled to restrain abnormal rising of high pressure by the High-pressure SW.
2) When cooling operation detects abnormal pressure of the stop zone, stop the compressor and the error

count becomes +1.

3) When the compressor stopped with 2), the compressor will restart only when the pressure lowers under

the reset pressure after 2 minutes and 30 seconds.

Temperature range

122°F (50°C) ≤ TO

113°F (45°C) ≤ TO < 122°F (50°C)

102.2°F (39°C) ≤ TO < 113°F (45°C)

TO < 102.2°F (39°C)

TO error







4) The error count when the compressor stopped

with 2) is cleared after the operation continued

for 10 minutes.
If the error count becomes [8] without clearing,

the error is determined and reactivation is not


5) For the error display contents, confirm on

the check code list.

Pressure of High-pressure switch control

STOP pressure

RESET pressure

601.8 + 0

⎛ 4.15 +0

.2 psi

– 29 psi ⎝

–0.2 MPa ⎠


± 29 psi (3.20 ± 0.2 MPa)

10. Auto restart

1) Object

It restarts the operation automatically after resetting the unexpected stop of power supply such as power


2) Contents

After returning from a power failure, the auto restart function reads the operation status from EEPROM

and then restarts the operation automatically according to the operation contents.

3) Setup of function exchange by wired remote

controller CODE No. (DN): 28


Auto restart