User manual CARRIER 38TCDOC

[. . . ] 6/7 2. 2 Accessories supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2. 3 Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PERFORMANCE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In case of difficulties with the connection it is better to replace the power PCB. If the trouble disappears the problem is solved. 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. Replace the power PCB if there are not 12 VAC. 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). Check if refrigeration circuit is partially or totally clogged. Compressor is unable to create the necessary pressure differential. 26 10 Trouble TROUBLESHOOTING Mod. 51AKM 006, 51AKM 06G, RTE 165F, RTE 165G, VTE 075F, VTE 075G Action Air filter is clogged. Cooler fins are bent and they partially close the air passage. Refrigerant charge is not sufficient. Remedy Clean air filter. Put the unit in Fan Only mode until outside coil is defrosted. Remove the charge, identify and repair any possible leaks and recharge the circuit. See section "Compressor does work and the fan is working in Cooling and in Dehumidification modes". Add refrigerant, identify and repair any possible leaks and recharge the circuit. Replace the clogged parts and recharge the circuit. Replace the compressor. Too much frost on cooler. Unit does not cool at all. Compressor does not work. The charge is too low or has escaped. [. . . ] 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. [. . . ]