User manual CARRIER AEM009C7

[. . . ] Service manual Portable air conditioners 51AKA 006 51AKB 006G 51AKM 006G 51AKB 008G RTB 165G RTE 165G RTB 205C VTB 075C Contents page 1. ASSEMBLY DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PARTS DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4/5 2. 1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] SIGNAL ­ flashes on the display and LEDs off LED flashing CAUSE ­ Water tank full or not correctly inserted ­ Ambient air thermostat not working (the unit will operate for 1 hour) ­ Electronic Printed Circuit Board defective or fan not connected REMEDY ­ Empty the water tank or check that it is correctly inserted ­ Replace the room temperature sensor ­ Replace the control PCB or connect the fan ­ Display and ­ Fan speed LED flashing Attention The operation outlined by * requires momentary connection between parts under voltage and therefore they must be executed with caution. In case of difficulties with the connection it is better to replace the power PCB. If not reutilize the old power PCB and replace the control PCB. Trouble Unit does not work at all. Action Check the supply voltage. Disconnect connector A on the power PCB and verify that there are 12 VAC between the pin A4 and the pin A2 (or between pin A4 and the quick connector F2). Remedy Call an electrician in case it is more than 15% less than the nominal voltage. If not replace the control PCB. Compressor and fan do not work in Cooling and in Dehumidification modes. Verify if Timer On was activated. Deactivate Timer On pushing the corresponding button until the message appears on the display. Unit cannot run in the Dehumidification mode when the temperature is less than 10 °C. Empty the condensate tank or place it in the correct position. The message blinks on the display and the LEDs are on (Dehumidification mode only) The message flashes on display and the LEDs are off. Compressor does not work and the fan is working in Cooling and in Dehumidification modes. Check the supply voltage. Check if there is voltage between quick connector F1 and both the quick connectors of relay RL3. If voltage is found, check if compressor thermal protection is closed. If compressor thermal protector is okay, check compressor winding resistance (see Table 2 of page 57). * If no voltage is found disconnect connector A on the power PCB, connect contact A3 of the power PCB to quick connector F2 and check if relay RL3 trips or not. 25 Call an electrician in case it is more than 15% less than the nominal voltage. Replace air sensor if necessary. Replace compressor thermal protector if necessary. Replace compressor if necessary. If relay does not trip it is necessary to replace the control PCB otherwise the power PCB. 10 Trouble TROUBLESHOOTING Mod. 51AKM 006, 51AKM 06G, RTE 165F, RTE 165G, VTE 075F, VTE 075G Action Check the start capacitor. Connect the fan motor directly to the supply. Remedy Replace start capacitor if necessary. Replace the motor in case it does not work; if motor works replace the control PCB. Call an electrician in case it is more than ±10% of the nominal voltage. Clean or straighten the fins. Unit does not work and both fan speed LEDs are blinking. Fan motor is continuously cycled on-off by its built-in overload protector. Check the supply voltage. Ensure that the coils are clean and their fins are not damaged. Compressor motor is continuously cycled on-off by its built-in overload protector. Check supply voltage Check if air temperature is lower than maximum allowed one. Ensure that the condenser coil is clean and its fins are not damaged. Call an electrician in case it is more than ±10 of the nominal voltage. If fan speed is too low at maximum speed it is necessary to replace the motor Clean or straighten the fins. Check compressor and condenser. Replace it if it does not work. Check if refrigeration circuit is partially or totally clogged. Replace the clogged parts and recharge the circuit. The cooling effect is not sufficient. Air filter is clogged. Ensure that the condenser and cooler coils are clean and their fins are not damaged. Compressor motor is continuously cycled on-off by its overload protector. [. . . ] Insert the tester according to the wiring diagram indication and put the thermostat knob to the maximum cooling position to check the continuity between thermostat contacts. This test must be carried on only when all cables are disconnected from the thermostat. 28 B) Electric parts In case of a fault of any electric component, to identify the problem and to solve it apply the procedures described on the next pages. To carry out these tests it is necessary to remove unit front panel. 10. 1 Component testing procedure Capacitor body To each terminal Capacitor To capacitor body Capacitor Compressor Fig. 2 Capacitors Remove the plug from the socket and remove the cables from the capacitor. [. . . ]