Sanyo MDF-U333, Service Manual

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２． ２． ２． ２．
Temperature control and High, Low temperature alarm
<Temperature control>
Setting range
：
-18
℃～
-40
℃
Display range
：
-50
℃～
+50
℃
Setting method
：
Press SET key and set the required value with key and
Key. Press SET key again to memorize the set value,
And then return to PV display.
Out of setting range : If change to out of setting range value by mistake and press
SET key , buzzer sound continuously for 1 second.
<Alarm>
High temperature alarm
：
When the internal temperature is higher than SV ( + 5
℃～
+15
℃
), alarm lamp and
digital display is blinking. After 15min.later, buzzer will sound and remote alarm
contact will turn ON. (initial value: +10
℃
)
Low temperature alarm
：
When the internal temperature is lower than SV
（
-5
℃～
-15
℃）
, alarm lamp and digital
display is blinking. After 15min.later, buzzer will sound and remote alarm contact will
turn ON. (initial value: -10
℃
)
Setting method
：
Keep pressing key over 5 seconds to enter function mode (“F00”).
Then press key to count up value. Change “F01” to input high temperature alarm
value, “F02” to input low temperature alarm value.
Set either “F01” or “F02” then press SET key to turn alarm temperature setting mode
to set required value with key and key.
Press SET key again to memorize value.
Out of setting range
：
If change to out of setting range value by mistake and press SET key , sound buzzer
continuously for 1second and remain in setting mode to maintain the setting value.
３． ３． ３． ３．
Defrosting
This function is different by each model code (products) .
a. In PV display keep pressing DEF key over 5 seconds, defrosting will be started.
Model code 001 (MDF-U333) --- Force to turn compressor OFF.
Model code 002 (MDF-U537) --- Force to turn compressor & solenoid valve OFF. (Use 1 solenoid valve)
Model code 003 (MDF-U537D)
--- Single compartment
→
Force to turn OFF solenoid valve at the ROOM lamp illuminated.
--- Both compartments
→
Force to turn OFF 2 solenoid valves & compressor.
b. Press again DEF key to quit defrosting.
（
Manual start and finish
）