Toshiba RAV-GM1601AT8P-E Service Manual page 53

REQUIREMENT
While heating the coil, the power sound may be heard. However it is not a trouble.
6. 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.
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 (I1) is
selected from the following table according
to TO sensor value.
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 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 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]
Abnormal stop
a
Frequency normal down
b
Frequency slow down
c
Frequency hold
d
Frequency slow up (Up to command)
e
As command is
TE
2 ˚C
1 ˚C
• Power-ON
condition
0 ˚C
TD < 30˚C
-1
˚C
Output power
- 53 -
(In defective TO sensor)
No power
Intermittent power-ON
10 minutes: ON /
5 minutes: OFF
Continuous power-ON
50W
Current release control value (I1)
Temperature range
47°C ≤ TO 5.7
44°C ≤ TO < 47°C 9.3
39°C ≤ TO < 44°C 10.0
TO error 4.8
HEAT
TC
a 61°C
b 57°C
c 54°C
d 52°C
e 48°C
[A]
[°C]
COOL
TL
62°C
62°C
60°C
58°C
54°C