Toshiba RAV-SM560AT-E Service Manual page 64

NOTIFICATION
It is not an abnormal phenomenon that electro-noise may be heard while heating the coil.
4. Short intermittent operation preventive control
Q
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.)
R
If the equipment is stopped from the remote controller, the operation does not continue.
5. High-voltage suppression TE control (Only for SM800)
Q
This control suppresses that voltage becomes abnormally higher during cooling operation.
R
Stop the compressor under condition of TE ≥ 67°C, and count 1 on the error count.
S
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.
T
When TE ≥ 67°C is detected again within 10 minutes, 1 is added to the error count and restart is
repeated.
U
If the error counts 10 are recognized, it is determined as an error and restart is not performed. Error
code 'P04' is displayed.
V
After restarting the compressor, continue controlling by using 70% to 90% of the control value of the
current release control for minimum 30 minutes.
6. Over-current preventive control
Q
This control function stops the compressor when over-current preventive circuit has detected an
abnormal current.
R
The compressor restarts with error count 1 after 2 minutes 30 seconds.
S
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.
7. Current release value shift control
1) Object: SM800
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 9-2-2 by TO sensor
value.
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
2) Object: SM560
The current release value of a single-phase model is se-
lected from the right table according to TO sensor value.
I1 x a%
I1 x b%
I1 x c%
I1 x d%
As I1
– 63 –
Corrected value
T a b
SM800
39°C 40% 60%
Current release value shift control
TO
45 ≤ TO
40 ≤ TO < 45
TO < 40
c d
80% 85%
SM560
6.07
6.90
9.22