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overhigh protection. If it is below 48ć, the unit will resume to be normal.
TC
P reduce slowly
55
Q remaining
52
48 R rise slowly
P: reduce at the speed of 1Hz/10s
Q: remain the previous value
R: rise at the speed of 1Hz/10s
7.2.9.4 Overcurrent protection(realised by power module)
ƽIn the course of compressor startup, if current is over 13A and keeps for 3 seconds, compressor
will stop and the unit alarms. 3 minutes later, compressor will re-start up, if in 10 minutes, it occurs for
3 times, the unit will stop and alarm.
ƽOvercurrent reducing frequency protection
When current is over (B)A, compressor will reduce frequency at 1HZ/s, and will stop when it is
below (B)A and over (B-1)A, then rise frequency at 1HZ/10s; when current is below (B-1)A, it will
resume the target frequency.
Remarks: Power module frequency limited point: 88ć, if the frequency reduces down to 86ć,
but if it is up to 90ć, the unit will stop and alarm.
7.2.9.5 Indoor heat exchanger anti-freezed protection
11ć
9ć
7ć
6ć
5ć
When T
C
LJ 5ć, compressor frequency will reduce at 1HZ/10s
When T
C
begins to rise up, and 6LJ=T
C
LJ=7ć, compressor frequency will remain
7.2.9.6 Outdoor temperature limitation
Cool: When outdoor temperature is below 15ć, in cooling, compressor frequency will be limited
below 50Hz, and outdoor fan speed is compusorily Class-1.
Heat: When outdoor temperature is over 20ć, in heating, compressor frequency will be limited
below 50Hz, and outdoor fan speed is compulsorily Class-1.
If the above is AC motor, the compulsory fan speed will be low speed.
7.2.9.7 Rated operation
ƽ Rated cooling:
-138-