Short Intermittent Operation Preventive Control; Current Release Value Shift Control; Over-Current Protective Control; High-Pressure Release Control - Toshiba RAV-GM561ATP-E Service Manual

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]
a
Frequency normal down
b
Frequency slow down
c
d
Frequency slow up (Up to command)
e
• Power-ON
condition
TD < 30˚C
Output power
Abnormal stop
Frequency hold
As command is
( n I d e e f t c
TE
2 ˚C
1 ˚C
0
˚C
-1 ˚C
GM56, 80 GM110, 140
20W
Current release control value (I1)
Temperature range
47°C ≤ TO
44°C ≤ TO < 47°C
39°C ≤ TO < 44°C
TO error
HEAT
TC
a 62°C
b 57°C
c 55°C
d 53°C
e 49°C
- 45 -
FILE NO. SVM-18043
v i e T O s e n s o ) r
No power
Intermittent power-ON
10 minutes: ON /
5 minutes: OFF
Continuous power-ON
50W
GM56 GM80
4.7 7.1
4.7 9.9
6.2 11.3
4.7 7.1
GM56, 80 GM110, 140
COOL HEAT
TL TC
63°C 62°C
63°C 57°C
61°C 55°C
59°C 53°C
55°C 49°C
[A]
GM110 GM140
15.8 15.8
17.4 17.4
18.3 18.3
15.8 15.8
[°C]
COOL
TL
63°C
62°C
60°C
58°C
54°C