User manual CARRIER 38TCDOC

[. . . ] 6/7 2. 2 Accessories supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2. 3 Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PERFORMANCE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In this way all the electrical and electronic parts of control panel can be reached and it is also possible do all checks and parts substitutions of the same panel. Control panel removal Release the control panel pushing the plastic tab with a screwdriver and extract the panel sliding it towards the right. Control PCB removal Important: Discharge the body static electricity touching a metal part before touching the PCB. Slightly pull apart the two plastic body sides which fasten the PCB in order to release and remove it. 22 9 UNIT DISASSEMBLY Electromechanical control removal Remove the plug-in switch knob, release the plastic tab and remove the switch end the board. Rear panel removal Remove the condensate tank in the rear of the unit. Unscrew the four side clamping screws, lift the back panel about 10 mm and finally remove it. At this point it is possible to make any check and/or service operation on the unit. Power PCB replacement Important: Discharge the body static electricity touching a metal part before touching the PCB. Push with a sharp tool in the hole in order to release the PCB from the clamp and to extract it. 23 9 UNIT DISASSEMBLY Fan motor replacement Disconnect the polarized electronic connector and TH sensor. Using a screwdriver release the four plastic tabs that keep the half scroll of the fan in place. In this way it is possible to extract the motor from the rubber vibration isolators which are supporting it. If one or more plastic tabs of the half scroll of the fan are broken, the half scroll can be secured by similar screws to the ones used in the unit, during the re-assembly. Electric heater removal (models 51AKM 006, 51AKM 06G, RTE 165F, RTE 165G, VTE 075F, VTE 075G) Disconnect the polarized electric connector. Remove the securing screw, release the plastic tab, slide the electric heater compartment toward the right and then remove the electric heater compartment and the heater itself. Coil removal Remove the air flow flap and its holder. Remove the pipe conduit plate releasing the six plastic tabs which secure it to the unit. Extract the refrigerant from the unit using a suitable device and avoiding to exhaust it in the atmosphere. Unsolder and disconnect coil piping and then remove it. 24 10 TROUBLESHOOTING Mod. 51AKM 006, 51AKM 06G, RTE 165F, RTE 165G, VTE 075F, VTE 075G Autodiagnostic In the event of malfunctions, a warning will be given automatically on the display. Refrigerant charge is not sufficient. Clean or replace the air filter. Remove the charge, identify and repair any possible leaks and recharge the circuit. Check compressor current and replace compressor if necessary. Check fan speed when motor is at maximum speed and supplied right voltage. 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. 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 compressor. Too much frost on cooler. Unit does not cool at all. Compressor does not work. The charge is too low or has escaped. The noise is due to the compressor. The fan does not work in Fan Only mode. Verify if Timer On was activated. Deactivate Timer On pushing the corresponding button until the message appears on the display. Deactivate Timer On pushing the corresponding button until the message appears on the display. [. . . ] The tests must be carried on using a TESTER suitable for troubleshooting. Insert the tester in the different positions of the changeover switch shown in the wiring diagram to check the continuity between the contact and the corresponding position of the change-over switch. This test must be carried out only when all cables are disconnected from the change-over switch. Supply cable Check the voltage at the terminals while the plug is connected to the socket. [. . . ]