Carrier 42NQ009N Service Manual

Contents

FILE NO. SVM-1003617 --7-3-4. Heating operation([MODE] button on the remote control is setto the heating operation.)7-3-3. Dry operation([MODE] button on the remote control is setto the dry operation.)(1) The compressor, 4-way valve, outdoor fan andoperation display lamp are controlled as shown inFig. 7-3-6.Fig. 7-3-6(2) The microprocessor turns the compressor on andoff at the regular intervals (4 to 6 minutes). Whilethe compressor is turning off, the indoor fan motoroperates in the SUPER LOW position.The pattern of operation depending on the relationbetween room temperature and presettemperatures is shown in Fig. 7-3-7.Fig. 7-3-7(3) [FAN] button on the remote control is set to AUTOonly.(4) The ECO and Hi Power operations can not be set.Presettemp.+3+2+10OFF ONOFF4-way valveOutdoor fanOPERATIONCompressorON:6min.OFF:4min.ON:5min.OFF:5min.OFFON:6min.OFF:4min.ON:5min.OFF:5min.display lamp(Room temp.) (Preset temp.)Room temp.Preset temp.+1Preset temp.CompressorOutdoor fanIndoor fan L. *S.L. S.L.L. L. S.L. L.ON ON ON ONOFF OFF OFF*Super Low[FAN AUTO]-0.5-1-1.5-2*1*2-5.0-5.50Presettemp.M+HL°C(Room temp.) − (Preset temp.)° C*2 : Fan speed = (M + − L) x 2/4 + L*1 : Fan speed = (M + − L) x 1/4 + L*3 : Fan speed = (M + − L) x 3/4 + L(Calculated with inear approximation from M+ and L+)Fig. 7-3-9(1) The compressor, 4-way valve, outdoor fan andoperation display lamp are controlled as shown inFig. 7-3-8.Fig. 7-3-8(2) When [FAN] button is set to AUTO, the indoor fanmotor operates as shown in Fig. 7-3-9. When[FAN] button is set to LOW, LOW+ , MED, MED + orHIGH, the motor operates with a constant air flow.ONOFFONOFFON ON4-way valveOutdoor fanCompressorPresettemp.OPERATIONdisplay lamp00.5(Room temp.) (Preset temp.)° C