Toshiba RAV-SP560AT-E Service Manual page 112

9. Current release value shift control
Q
This control function prevents troubles of the electron parts such as G-Tr of inverter of compressor
drive system and troubles of the compressor during cooling operation.
R
This control function corrects the current release control value ( 1) in item 3 of 7-1. by Current release
control.
S
The value to be corrected is based upon the following control diagram and correction value table.
TO [˚C]
T+8
T+7
T+5
T+4
T+2
T+1
T
T-1
10. Defrost control
Q
In heating operation, defrost operation is performed when TE sensor temperature satisfies any
condition in A zone to D zone.
R
The defrost operation is immediately finished if TE sensor temperature has become 12°C or more, or
it also is finished when condition of 7°C ≤ TE < 12°C has continued for 1 minute. The defrost operation
is also finished when defrost operation has continued for 10 minutes even if TE sensor temperature
has become 7°C or lower.
S
After defrost operation has finished, the compressor and the outdoor fan start heating operation after
stopped for approx. 50 seconds.
Start of heating operation
0
TE [˚C]
–5
–10
–13
–18
* The minimum TE value between 10 and 15 minutes after heating operation has started is stored in memory as TE0.
A zone
B zone
C zone
D zone
a
b
c
d
T
I1 x a%
I1 x b%
I1 x c%
I1 x d%
As I1
10 15
*
Defrost operation is performed in this zone when TE0-TE ≥ 3 continued for T seconds.
Defrost operation is performed in this zone when TE0-TE ≥ 3 continued for T seconds.
Defrost operation is performed when this zone continued for T seconds.
Defrost operation is performed when this zone continued for T seconds.
SM1100, SM1400
34
40
55
90
20
T
SM1100 39°C
SM1400 39°C
c b a
B zone B zone
C zone C zone
– 112 –
RAV-SM1100/1400AT-E
Corrected value
a b c
50% 70% 80%
70% 80% 90%
d [min]
A zone A zone
D zone D zone
d
90%
95%