SUPER DIGITAL
SUPER DIGITAL
SUPER DIGITAL
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1. Pulse Motor Valve (PMV) control<br />
1) For PMV with 50 to 500 pulses during operation, respectively.<br />
2) In cooling operation, PMV is controlled with the temperature difference between TS sensor and TC sensor.<br />
3) In heating operation, PMV is controlled with the temperature difference between TS sensor and TE sensor.<br />
4) For the temperature difference in items 2) and 3), 1 to 5K is aimed as the target in both cooling and<br />
heating operations.<br />
5) When the cycle excessively rose in both cooling and heating operations, PMV is controlled by TD sensor.<br />
The aimed value is usually 106°C in both cooling and heating operations.<br />
REQUIREMENT<br />
A sensor trouble may cause a liquid back-flow or abnormal overheat resulting in excessive shortening of the<br />
compressor life. In a case of trouble on the compressor, be sure to check there is no error in the resistance<br />
value an the refrigerating cycle of each sensor after repair and then start the operation.<br />
2. Discharge temperature release control<br />
1) This function controls the operation<br />
frequency, that is, lowers the operation<br />
frequency when the discharge temperature<br />
has not lower or the discharge temperature<br />
has rapidly risen during PMV control.<br />
It subdivides the frequency control up to a<br />
unit of 0.6 Hz to stabilize the cycle.<br />
2) When the discharge temperature is detected<br />
in an abnormal stop zone, the unit stops the<br />
compressor and restarts after 2 minutes<br />
30 seconds.<br />
The error counter is cleared when it has<br />
continued the operation for 6 minutes.<br />
If the abnormal stop zone has been detected<br />
by 8 times without clearing of counter, an<br />
error “P03” is displayed.<br />
∗ The cause is considered as excessively<br />
little amount of refrigerant, defective PMV,<br />
or clogging of cycle.<br />
TD [˚C]<br />
117<br />
107<br />
103<br />
100<br />
93<br />
Error stop<br />
(“P03” display with 8 times error count)<br />
As command is<br />
Frequency down<br />
Frequency slow-down<br />
Frequency holding<br />
Frequency slow-up<br />
(Up to command)<br />
3. Current release control<br />
The output frequency and the output voltage are<br />
controlled by AC current value detected by T02<br />
on the outdoor P.C. board so that input current of<br />
the inverter does not exceed the specified value.<br />
Current [A]<br />
I1<br />
Frequency down<br />
Hold<br />
Objective model<br />
SP40, SP45<br />
COOL HEAT<br />
I1–0.5<br />
Hold<br />
Normal operation<br />
I1 value [A]<br />
10.13 10.50<br />
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