Toshiba RAV-SP560AT-E Service Manual page 111

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5. Coil heating control
1) This control function heats the compressor by turning on the stopped compressor instead of a case
heater. It purposes to prevent slackness of the refrigerant inside of the compressor.
2) As usual, turn on power of the compressor for the specified time before a test run after installation,
otherwise a trouble of the compressor may be caused. As same as a test run, it is recommended to turn
on power of the compressor beforehand when starting operation after power of the compressor has been
interrupted for a long time.
3) A judgment for electricity is performed by TD and TO sensors. If TO sensor is defective, a backup control
is automatically performed by TE sensor. For a case of defective TO sensor, judge it with the outdoor LED
display.
4) Coil heating is controlled by TD and TE sensor.
5) For every model, the power is turned off when TD is 30°C or more.
TO [˚C]
18
15
Power-ON condition
10
TD < 30˚C
8
* TD sensor is read in once per 15 minutes
NOTIFICATION
It is not an abnormal phenomenon that electro-noise may be heard while heating the coil.
6. Short intermittent operation preventive control

The compressor may not stop for preventing the compressor for 3 to 10 minutes after start of the
operation even if Thermo-OFF signal has been received from the indoor. This phenomenon is not
abnormal. (Continuous operation time of the compressor differs according to the operating status.)
‚
If the equipment is stopped from the remote controller, the operation does not continue.
7. High-pressure suppression TE control

This control suppresses that pressure becomes abnormally higher during cooling operation.
‚ Stop the compressor under condition of TE ≥ 67°C, and count 1 on the error count.
ƒ
After 2 minutes 30 seconds passed, if TE < 67°C, the compressor restarts and the error count is
cleared when the operation continues for 10 minutes.
„ When TE ≥ 67°C is detected again within 10 minutes, 1 is added to the error count and restart is
repeated.
…
If the error counts 10 are recognized, it is determined as an error and restart is not performed. Error
code 'P04' is displayed.
†
After restarting the compressor, continue controlling by using 70% to 90% of the control value of the
current release control for minimum 30 minutes.
8. Over-current preventive control

This control function stops the compressor when over-current preventive circuit has detected an
abnormal current.
‚
The compressor restarts with error count 1 after 2 minutes 30 seconds.
ƒ
If the error counts 4 are recognized, it is determined as an error and restart is not performed. Error
code 'H01', 'H02' or 'P26' is displayed.
TO [˚C]
No power-ON
Continuous ON (L)
Continuous ON (M)
.
L
M
– 111 –
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RAV-SM1100/1400AT-E
(In trouble of sensor)
20
No power-ON
18
12
Continuous ON (L)
10
Continuous ON (M)
SM1100
20W and equivalent
40W and equivalent
SM1400
25W and equivalent
50W and equivalent