Haier AU42NALEAA Service Manual - Page 138
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>a__WcU[S^ a`V[e[a`Wc 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 TCLJ 5ć, compressor frequency will reduce at 1HZ/10s When TC begins to rise up, and 6LJ=TCLJ=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-
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