Panasonic Urban Multi MX1R Series Service Manual page 462

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