PACD011001C2 Outline of Control
Function UM Combination “MA1R Series” Using R-407C 441
[Defrosting in oil return mode]
SVTs turns ON continuously
„
SVTs is OFF at any case when STD compressor stops.
Operating Frequency Control
3.1.14 Inverter Protection Control
Controls the compressor upper-limit frequency to prevent tripping by inverter overcurrent and fin
temperature increase.
Compressor upper-limit frequency
(Nearest lower step listed below)
•71Hz+ON+OFF
•75Hz+OFF+OFF
•41Hz+OFF+OFF
41Hz+OFF+OFFNormal operation
HTdi≥110˚C HTdi≥115˚C
HTdi>130˚C
HTdi<105˚C
Compressor stop (for 5 min)
Forced
thermostat OFF
F3 Malfunction
stop
Normal operation
HTds1, HTds2≥110˚C
HTds1, HTds2<105˚C
HTds1, HTds2>130˚C
∗ Malfunction reset
HTdi<115˚C
HTs1, HTs2<115˚C
HTdi, HTds1, HTds2>130˚C
(V0831)
Up to 2 times
within 100 min
HTdi : Adjusted discharge temperature
for Inverter Compressor
[INV Compressor]
[STD Compressor]
Raising upper limit
frequency for 1-step
Normal operation
Lowering upper limit
frequency for 1-step
(V0832)
• Inverter current > 28
+3
-0
A
• INV fin temp. > 92˚C
OR
• Inverter current ≤ 28
+3
-0
A
• INV fin temp. < 87˚C
• 3-min elapse
OR
(every 10 sec) (every 3 min)
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