Toshiba RAV-GV1101AT8P-TR Service Manual page 39

REQUIREMENT
While heating the coil, the power sound may be heard. However it is not a trouble.
6. Heat sink temperature detection control
1) IPM overheating prevention is protective control performed by a thermistor (TH sensor) in proximity to
IPM.
2) When a temperature of TH e" 93°C is detected, the fan tap is moved by 1 step up.
Thereafter step-up is performed at a rate of +1 tap/5 seconds until a maximum fan tap is reached.
3) After 2) above, operation is returned to normal fan control at a temperature of TH < 93°C.
4) Operation of the compressor is terminated at a temperature of TH e" 95°C.
5) Operation is restarted after 2 minutes and 30 seconds using [1] as the trouble count. However a count of
[4] 4] in the same operation confirms a trouble.
The check code display is "P07" (Restart will not be performed).
* When trouble is confirmed, this may be a trouble caused by heat build-up or blower fan failure in the outdoor
unit, or a trouble in the IPDU board.
7.
Short intermittent operation preventive control
1) For 3 to 10 minutes after operation start, in some cases, the compressor does not stop to protect the
compressor even if receiving the thermostat-OFF signal from indoor.
However it is not abnormal status. (The operation continuance differs according to the operation status.)
2) When the operation stops by the remote controller, the operation does not continue.
8. 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 (I1) is
selected from the following table according
to TO sensor value.
9. 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 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.
10. High-pressure release control
1) The operation frequency is controlled to restrain abnormal rising of high pressure by TL sensor in cooling
operation and TC sensor in heating operation.
2) When TL sensor in cooling operation or TC sensor in heating operation detects abnormal temperature of
the stop zone, stop the compressor and the error count becomes +1.
3) When the compressor stopped with 2), the operation restarts from the point of the normal operation zone
(e point or lower) where it returned after 2 minutes 30 seconds.
4) The error count when the compressor stopped with 2) is cleared after the operation continued for 10
minutes.
If the error count becomes [10] without clearing, the error is determined and reactivation is not performed.
5) For the error display contents, confirm on the check code list.
HEAT TC / COOL TL
[˚C]
a
Frequency normal down
b
Frequency slow down
c
Frequency hold
d
Frequency slow up (Up to command)
e
Abnormal stop
As command is
Current release control value (I1)
Temperature range
47°C ≤ TO
44°C ≤ TO < 47°C
39°C ≤ TO < 44°C
TO ≤ 39°C
TO error
GV110, 140
HEAT
TC
a 62°C
b 57°C
c 55°C
d 53°C
e 49°C
- 39 -
[A]
GV110, 140
4.6
5.5
6.5
10.0
4.6
[°C]
COOL
TL
63°C
62°C
60°C
58°C
54°C