Sanyo MDF-U333, Service Manual

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Offset value
The function is to correct differential value between temperature of temperature sensor and
of internal 1/2H (centre of chamber).
Initial offset
001 (MDF-U333): Shift –1.5
℃
from temperature of temperature control sensor (PV)
002 (MDF-U537): Shift +1.0
℃
from temperature of temperature control sensor (PV)
(For upper, lower compartment)
003 (MDF-U537D): Shift +0.0
℃
from temperature of temperature control sensor (PV)
(For upper, lower compartment)
Second offset
001 (MDF-U333): None
002 (MDF-U537):-18
℃≧
SV
≧
-25
℃
--- shift –0
℃
from PV (For upper, lower compartment)
-26
℃≧
SV -- shift +1.0 from PV (For upper, lower compartment)
003 (MDF-U537D):-18
℃≧
SV
≧
-30
℃
--- shift PV-2.4+(-18-SV)
÷
5 (For upper compartment)
-30
℃＞
SV --- shift –0
℃
from PV (For upper compartment)
*Note) For lower compartment, add 0
℃
to PV.
１３．
１３． １３．
１３．
Display offset
In display, temperature that is lower than SV is shown for a little time. With this case, display
offset –0.5
℃
should be done. (Round off numbers to the first decimal point)
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Remote alarm
During normal operation … … … Remote alarm contact is OPEN
During alarm or power failure … … … Remote alarm contact is CLOSE
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Others
MDF-U537: In case of : -18
℃≧
SV
≧
–25
℃
with PV-SV+5
℃≧
0
Solenoid valve is: Forced to turn OFF
MDF-U537: In case of : PV-(SV-0.6
℃
)
≧
0 with PV
TOP
- PV
BOTTOM
-1
＞
0
Solenoid valve is: Forced to turn OFF
(In PV-(SV-0.6)
＜
0, quit to be forced to turn OFF)