Table of Contents. Models/Tech Data Sheet Location. Grille/Filter Removal. Power Supply. Fan Operation Adjustment. Temperature Limiting Switches

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2 Copyright 2004

3 Table of Contents Models/Tech Data Sheet Location Grille/Filter Removal Power Supply Fan Operation Adjustment Temperature Limiting Switches Vent Control - PC Board Service Blower and Fan Service Capacitors Cool Only (non-electronic) Wiring Diagram/Schematic Cool Only (electronic) Wiring Diagram/Schematic , Heat / Cool Wiring Diagram/Schematic 11 Heat 115V Pump Cool Only Wiring Fast Diagram/Schematic Moving Parts V Current/Differential Temperature Check 230/208V Current/Differential Temperature Check 230/208V Current/Differential Temperature Check Cool Only Non-Electronic Fast Moving Parts Cool Only Electronic Fast Moving Parts 115V Heat / Cool Fast Moving Parts 230/208 Heat / Cool Fast Moving Parts 115V/230V/208V Heat Pump Fast Moving Parts Warranty Notes

4 2004 ROOM AIR CONDITIONER Three New Model Series (Cool Only, Heat/Cool, Heat Pump) New 26 ROOM AIR Conditioners are being introduced. The line-up includes COOL ONLY, HEAT PUMP, AND HEAT/COOL models. This bulletin will introduce those models with examples from electro-mechanical and electronic remote units. Basic disassembly for grille, blower, outdoor fan, and dryer are the same. Model specific temperature charts, wiring diagrams, and other important product information is located in the Tech Data sheet shipped with each air conditioner. Depending on model and size, the air conditioner may have a power supply of 110, 208, or 230 Volts. TECHNICAL DATA SHEET is located in a plastic bag taped to the front right side of the case, and is accessed by removing the front grille. See page 2 of this bulletin for instructions on removing front grille. Models: COOL ONLY HEAT/COOL HEAT PUMP AJCH 08, 10 AJCH 10, 12 AJCQ 08, 10 AJCQ 10, 12 AJCS 06 AJCS 08,10 AJCS 09,10,12 ACB DCB ACB DCB LCB ACB DCB AJEH 12 DCB AJES 06 LSB AJES 08 ASB AJES 09,10,12 DCB AJES 10 DCB AJHS 08 ASB AJHS 08,10 DCB CAUTION! Before servicing any air conditioner, it is important to use hand and arm protection, such as Kevlar gloves and Kevlar arm guards, to protect against sharp edges and potential cuts and lacerations.! WARNING! To avoid personal injury, disconnect power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. RECONNECT ALL GROUNDING DEVICES If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. 2

5 POWER SUPPLY AND CURRENT LEAKAGE: POWER SUPPLY RATED VOLTAGE VOLTAGE LIMITS / ALL MODELS MAXIMUM CURRENT LEAKAGE: 0.5 MILLIAMP MAXIMUM GROUND PATH RESISTANCE: 0.1 OHM GRILLE REMOVAL Component Access: Control components can be accessed by removing the Front Cover. The unit must be removed from the case to access fans and refrigerant components. To Remove Grille: 1. Remove Filter and two screws. 2. Grasp cover at bottom and pull forward and lift up. 3. Pull the grille out from the bottom and lift up from the tabs at the top of the case. To Replace Grille: 1. Hook the tabs on the front grille even with the tabs on the case and snap into place. 2. Replace the screws and filter. 3

6 FAN OPERATION ADJUSTMENT The Fan operation can be set either for continous operation or cycle. The unit comes preset from the factory for continous operation. To change the setting: Insert small screwdriver through the hole in the control cover and slide the switch down for the fan to cycle, or up for continuous operation. CONT CYCLE When set at CYCLE (down) the fan cycles on and off when heating and cooling. When set at CONT (continous, up) the fan runs all the time. Air conditioner is shipped in the CONT setting. Fan Adjustment Hole Models with Thermostat Knob: To adjust the maximum and minimum setting, remove the thermostat knob and reposition screws to obtain the desired range. The range of the temperature control is approximately 60 0 F to 85 0 F. Changing the screw locations limits the rotation of the knob. Each hole location represents approximately 3 0 F. Temperature Limiting Setting Touch Pad Models: The maximum and minimum cool setting can be adjusted by resetting a dip switch located on the top of the control. TEMPERATURE LIMITING DURING COOL MODE( 0 F) UP DOWN MINIMUM NONE 1,2, , MAXIMU M 1, , , ,2,3 NONE , ,

7 VENT CONTROL Vent control is located behind the front grille on the right side of the air discharge area. When set to CLOSE, only the air inside the room will be circulated and conditioned. When set to OPEN, some inside air is exhausted to the outside. The air conditioner is shipped with the vent CLOSED. To Open or Close the Vent: 1. Remove the front Grille. 2. Remove the vent card screw. 3. Remove vent card, turn it over and replace it by locating rear hole in card over locating pin inside air discharge and reattaching screw at front. NOTE: Without removing unit from window and with the Grille removed, you can service the control assembly, thermostats, circuit board, run capacitor, and temperature sensor. SHOULDER BOLT To Service PC Board (electronic): 1. Remove PC Board Cover with 2 Phillips head screws. 2. Remove 1 Phillips head shoulder bolt mounting control panel to control enclosure. 2 SCREWS To Remove PC Board (electronic): 1. Remove 2 Phillips screws mounting control transformer to plastic housing. 2. Unplug wiring harness from PC board connec tors (note harness to connector location), CN2, CN1, CN4. 3. Unplug terminal connectors: T1 White T2 Orange T3 Red T5 Blue T4 Black- Indoor fan motor NOTE: Teminal ends are locking tabs. To remove, use needle nose pliers, depress tab in center and pull off wiring in the same motion. 5

8 BLOWER AND FAN SERVICE The air conditioner will have to be removed from the window to service the indoor blower/motor and the outdoor fan/motor. To Service Blower Fan: In order to access the fan and motor, you must diasassemble the spacer plastic fan housing. 1. With front grille removed, cut foam gasket on both sides of louver assembly. Remove two screws and lift out assembly. LOUVER ASSEMBLY 2. Remove two screws and two ground wires. Lift out metal blower fan housing. REMOVE LOUVER ASSEMBLY BLOWER FAN 5/16 NUT REMOVE HOUSING SIDE LIFT OUT METAL BLOWER HOUSING 3. Remove spacer bracket to remove plastic housing for motor access. REMOVE SPACER BRACKET 6

9 BLOWER AND FAN SERVICE (Cont d.) 4. Remove 4 Phillips head screws that mount plastic housing sides to coil housing. 5. Remove 4 Phillips head screws that mount coil housing to bracket. REMOVE SIDES INSIDE FAN MOTOR 4. Remove 4 Phillips head screws that mount motor to fan bracket. NOTE: In order to service inside blower/outside fan and motors, you will have to disassemble to this point. Both blower/fan are mounted with a 5/16 nut. REMOVE COIL HOUSING 5/16 NUT OUTSIDE FAN MOTOR REMOVE OUTSIDE FAN BLADE 7

10 CAPACITORS The electronic air conditioner has 3 start/run capacitors - one for each fan (blower/fan) and compressor. They are accessed by removing the grille, front pc board cover as previously described. Technicians will have full access to the capacitors with the pc board cover removed. OUTDOOR FAN START/RUN CAPACITOR BLOWER FAN START/RUN CAPACITOR COMPRESSOR START/RUN CAPACITOR NOTE: Compressor capacitor has a snap-in bracket to hold it in place. NOTE: Refer to the Technical Data Sheet for the most current information available regarding individual models. Adhere to all safety warnings and cautions cited in the Technical Data Sheet. 8

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