31
English
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Refer to the outdoor unit installation manual for information regarding troubleshooting.
Troubleshooting
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Страница 1: ...AHUControlUnit ACU Installation manual MXD U000XN Before operating this unit please read this manual carefully and retain it forfuture reference ...
Страница 2: ...ion 6 Functions of the AHU Control Unit ACU 6 Structure Diagram of the AHU Control Unit ACU 6 Installation 7 Accessories 7 External appearance 7 External dimensions 8 Circuit diagram 8 Installation 9 Wiring Diagram 13 Option settings 25 Appendix 31 Troubleshooting 31 ...
Страница 3: ...airthe product Potential risk of malfunction electric shock or fire Check if the installationwork is done correctlyaccording to the installation manual Incorrect installation may cause electric shock or fire The electricwork must be done byqualified person according to nationalwiring regulations and installation guide Ifanunauthorizedpersonperformstheinstallation anyresulting defectscancausemalfun...
Страница 4: ...n a prominent location in the text of the manual NOTE This equipment has been tested and found to complywith the limits fora Class B digital device pursuant to Part15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used...
Страница 5: ...mbers of ICM Referto the table belowfor information regarding compatibility Allowable indoorunit coil volume Capacity tons Minimum CoilVolume in l Maximum CoilVolume in l 2 91 54 1 5 213 58 3 5 3 122 05 2 0 244 09 4 0 3 152 56 2 5 335 63 5 5 4 152 56 2 5 335 63 5 5 5 183 07 3 0 366 14 6 0 Allowable indoorunit connections OutdoorUnit Capacities ton Allowed IndoorUnit Connections ton Performance ton...
Страница 6: ...gnals from a 24VAC thermostat The AHU Control Unit ACU provides 24 VAC output signals for the thermostat to the third party indoor unit See page 8 for the circuit diagram for the AHU Control Unit ACU Structure Diagram of the AHU Control Unit ACU OutdoorUnit 24VAC Thermostat field supplied AHU Control Unit Third partyIndoorUnit AHU Furnace A coil etc ...
Страница 7: ...ol Unit ACU Cable tie 2 M4x16 screw 4 U ring 20 Fan speed controlwire 1 Holderlock 4 Installation manual 1 Wire label 1 External appearance 1 2 3 4 No Parts and components 1 Front cover Case top 2 PCB 3 Rearcover Case bottom 4 Magnet Installation ...
Страница 8: ... ACU INDOOR FAN 3 STEP INDOOR FAN 2 STEP INDOOR FAN1 STEP COMPRESSOR STAGE 1 OUTDOOR COMMUNICATION AC POWER 24Vac COMPRESSOR STAGE 2 FAN AUX HEATER STAGE 1 4WAY VALVE COMPRESSOR STAGE 1 COMPRESSOR STAGE 2 FAN AUX HEATER STAGE 1 AUX HEATER STAGE 2 Dehumidification THERMOSTAT AHU INDOOR AUX HEATER STAGE 2 Dehumidification 4WAY VALVE FAN SPEED CONTROL Reset Reserved ...
Страница 9: ... or on a wall near the indoor unit to prevent access by users Do not install the AHU Control Unit ACU outdoors Do not install the AHU Control Unit ACU in a location with direct sunlight or a location with a risk that the AHU Control Unit ACU may come into contact with liquid or may be impacted Close the AHU Control Unit ACU securely 1 Push the middle area of the AHU Control Unit ACU to separate th...
Страница 10: ...st 2 along the bottom 3 8 ormore 3 8 ormore Magnet at 4 spots 3 8 ormore Screw hole at 4 spots 2 ormore 4 Insert the wires into the device by passing them through the opening created in step 2 5 Use the supplied labels to label the wires before connecting to the corresponding terminals ĮЇϩʒͱͱθ Ɵ ʪθ ͱϑϩɇϩ Ã ʒͱͱθ ߣ ߣ ǽߣ ǽߣ ǽߣ ǽߣ ߤ ߤ ߥ ߥ ߦ ߦ ǽߤ ǽߤ ǽߤ ǽߤ Ǯߣ Ǯߣ Ǯߣ Ǯߣ Ǯߤ Ǯߤ Ǯߤ Ǯߤ U U U U Įࢩ9 Įࢩ9 Įࢩ9 Įࢩ9...
Страница 11: ...ion O B 4 way reversing valve R AC Power24 V C AC Power24 V Connector G1 Fan speed step control YEL G2 Fan speed step control BLU G3 Fan speed step control RED Compression ring terminal specifications forconnection to the AHU Control Unit ACU PCB W t E F L ØD G Stud Range of PermittedWires Rated Size Stud Size Basic Size mm inch AWG mm inch mm inch mm inch t ØD G E F W L 22 to16 0 25 to1 65 0 0003...
Страница 12: ...rtphone camera to scan the QR code 8 Pass the supplied cable tie through the wire organizerloop secure the wires connected to the terminal blocks Ensure that the knot of the cable tie faces the side F1 F2 Y1 Y2 G W 1 W2O B R C Y1 Y 2 G W 1 W 2 D O B D Cable tie Ensure that the knot of the cable tie faces to the side Wire Correct Incorrect 9 Align the front coverwith the top of the AHU Control Unit...
Страница 13: ...tput terminal in the AHU Control Unit ACU CAUTION Turn off the power before connecting the terminals Use appropriate tools forwiring Be sure to connect the wires tightly using a tightening torque less than the standard torque to withstand external pressure Screws on the PCB terminal must be tightened with less than a 0 53 lbf in 6 N cm tightening torque If a greater tightening torque is used the s...
Страница 14: ...SW1 on off 1 Stage Thermostat 1 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output Y Y1 Y1 Y Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C ť ʪɇϑʪ θʪЭ ʪи ϩ ʪ ĮΧϩ ͱ Ɗʪϩϩ ϑ ϑʪʀϩ ͱ ͱθ ɇʒʒ ϩ ͱ ɇ ϑцϑϩʪ ͱΧϩ ͱ ϑʪϩϩ ϑ Ã ϩ ʪ ϑцϑϩʪ ϑ Їϑʪʒ ɇϑ ɇ ʪɇϩ ΧЇ Χ ɇ ʒ ϩ ʪθʪ ϑ ͱ ɇЇу ɇθц ʪɇϩʪθࡥ ʀͱ Їθʪ ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇϑ ɇ ߣ ϑϩɇ ʪ ʪɇϩ ΧЇ Χ ɇ ʒ ʀͱ Їθʪ ϩ ʪ ߦࣛǮɇц θʪЭʪθϑ Эɇ Эʪ ϩͱ 9 Ã ɇ...
Страница 15: ... Ƹࢩ Їθ ɇʀʪ ϑЇΧΧͱθϩϑ ɇ ʒʪ Ї ʒ ʀɇϩ ͱ ϑ ɇ ࡥ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ ɇ ʒ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ и ɇʒ Їϑϩ ͱΧʪθɇϩ ͱ ϩͱ ͱΧϩ іʪ ʒʪ Ї ʒ ʀɇϩ ͱ 1 2 3 4 5 6 7 8 DIPSW1 on off AHUwith Cooling onlyConfiguration 2 Stage Thermostat 2 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output Y1 Y1 Y1 Y1 Y2 Y2 Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C ť ʪɇϑʪ θʪЭ ʪи ϩ ʪ ĮΧϩ ͱ Ɗʪϩϩ ϑ ϑʪʀϩ ͱ ͱ...
Страница 16: ... ͱ ɇ Ã ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇ ʒ ϩ ʪ Ƹࢩ Їθ ɇʀʪ ϑЇΧΧͱθϩϑ ɇ ʒʪ Ї ʒ ʀɇϩ ͱ ϑ ɇ ࡥ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ ɇ ʒ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ и ɇʒ Їϑϩ ͱΧʪθɇϩ ͱ ϩͱ ͱΧϩ іʪ ʒʪ Ї ʒ ʀɇϩ ͱ 1 2 3 4 5 6 7 8 DIPSW1 on off 2 Stage Thermostat 1 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output Y1 Y1 Y1 Y Y2 Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C Please review the Option Settings section for ad...
Страница 17: ...e Thermostat 1 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output Y Y1 Y1 Y Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C ť ʪɇϑʪ θʪЭ ʪи ϩ ʪ ĮΧϩ ͱ Ɗʪϩϩ ϑ ϑʪʀϩ ͱ ͱθ ɇʒʒ ϩ ͱ ɇ ϑцϑϩʪ ͱΧϩ ͱ ϑʪϩϩ ϑ Ã ɇ ɇЇу ɇθц ʪɇϩʪθ ϑ ϑϩɇ ʪʒ ɇ ʒ ϩ ʪ ʪɇϩʪθ ʀɇ ͱΧʪθɇϩʪ ϑ Ї ϩɇ ʪͱЇϑ ц и ϩ ϩ ʪ ʪɇϩࣛΧЇ Χࡥ ʀͱ Їθʪ ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇϑ ɇ ߣ ϑϩɇ ʪ ʪɇϩ ΧЇ Χ ɇ ʒ ʀͱ Їθʪ ϩ ʪ ߦࣛиɇц θʪЭʪθϑ Эɇ Эʪ ϩͱ ...
Страница 18: ...onnection of the dehumidification D terminal is optional If the thermostat and the AHU furnace supports a dehumidification signal the outdoor unit and AHU Control Unit ACU will adjust operation to optimize dehumidification 1 2 3 4 5 6 7 8 DIPSW1 on off AHU Electric Heat emergencyheat with Heat Pump Configuration 2 Stage Thermostat 2 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output...
Страница 19: ...ϩ ʪ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ Aͱ ʪʀϩ ͱ ͱ ϩ ʪ ʒʪ Ї ʒ ʀɇϩ ͱ U ϩʪθ ɇ ϑ ͱΧϩ ͱ ɇ Ã ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇ ʒ ϩ ʪ Ƹࢩ Їθ ɇʀʪ ϑЇΧΧͱθϩϑ ɇ ʒʪ Ї ʒ ʀɇϩ ͱ ϑ ɇ ࡥ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ ɇ ʒ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ и ɇʒ Їϑϩ ͱΧʪθɇϩ ͱ ϩͱ ͱΧϩ іʪ ʒʪ Ї ʒ ʀɇϩ ͱ 1 2 3 4 5 6 7 8 DIPSW1 on off 2 Stage Thermostat 1 Stage AHU Thermostat AHU Control Unit ACU Indoorunit Input Output Y1 Y1 Y1 Y Y2 Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B...
Страница 20: ...mostat AHU Control Unit ACU Indoorunit Input Output Y Y1 Y1 Y Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C ť ʪɇϑʪ θʪЭ ʪи ϩ ʪ ĮΧϩ ͱ Ɗʪϩϩ ϑ ϑʪʀϩ ͱ ͱθ ɇʒʒ ϩ ͱ ɇ ϑцϑϩʪ ͱΧϩ ͱ ϑʪϩϩ ϑ Ã ϩ ʪ ϑцϑϩʪ ϑ Їϑʪʒ ɇϑ ʀͱͱ ࣛͱ ц и ϩ ɇЇу ɇθц ʪɇϩʪθࡥ ʀͱ Їθʪ ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇϑ ɇ ߣ ϑϩɇ ʪ ʀͱͱ ࣛͱ ц ϑцϑϩʪ Ã ɇ Ǯߣ ͱθ Ǯߤ ϑ ɇ ϑ ΧЇϩࡥ ϩ ʪ ɇ θ ʀͱ ʒ ϩ ͱ ʪθ ɇ ʒ ɇЇу ɇθц ʪɇϩʪθ ϩЇθ ͱ Ã ɇ ϑ ʪ ϑϩɇ ʪ ߣࣛϑϩɇ ʪ ϩ ʪθ...
Страница 21: ...optional If the thermostat and the AHU furnace supports a dehumidification signal the outdoor unit and AHU Control Unit ACU will adjust operation to optimize dehumidification 1 2 3 4 5 6 7 8 DIPSW1 on off A Coil Furnacewith Heat Pump Configuration 2 Stage Thermostat 2 Stage Furnace Thermostat AHU Control Unit ACU Indoorunit Input Output Y1 Y1 Y1 Y1 Y2 Y2 Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D...
Страница 22: ...ʪ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ Aͱ ʪʀϩ ͱ ͱ ϩ ʪ ʒʪ Ї ʒ ʀɇϩ ͱ U ϩʪθ ɇ ϑ ͱΧϩ ͱ ɇ Ã ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇ ʒ ϩ ʪ Ƹࢩ Їθ ɇʀʪ ϑЇΧΧͱθϩϑ ɇ ʒʪ Ї ʒ ʀɇϩ ͱ ϑ ɇ ࡥ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ ɇ ʒ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ и ɇʒ Їϑϩ ͱΧʪθɇϩ ͱ ϩͱ ͱΧϩ іʪ ʒʪ Ї ʒ ʀɇϩ ͱ 1 2 3 4 5 6 7 8 DIPSW1 on off 2 Stage Thermostat 1 Stage Furnace Thermostat AHU Control Unit ACU Indoorunit Input Output Y1 Y1 Y1 Y Y2 Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O...
Страница 23: ...Thermostat 1 Stage Furnace Thermostat AHU Control Unit ACU Indoorunit Input Output Y Y1 Y1 Y Y2 Y2 G G G G W1 W1 W1 W1 W2 W2 W2 W2 D D D D O B O B O B O B R R R C C C ť ʪɇϑʪ θʪЭ ʪи ϩ ʪ ĮΧϩ ͱ Ɗʪϩϩ ϑ ϑʪʀϩ ͱ ͱθ ɇʒʒ ϩ ͱ ɇ ϑцϑϩʪ ͱΧϩ ͱ ϑʪϩϩ ϑ Ǯ ʪ ϩ ʪ ϑцϑϩʪ ʀͱ ϑ ϑϩϑ ͱ ɇ ࣛʀͱ ɇ ʒ ɇ Їθ ɇʀʪ ɇ ʒ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ и ɵʪ ʀͱ Їθʪʒ ϩͱ ɵʪ Їϑʪʒ ɇϑ ʀͱͱ ࣛͱ цࡥ ʀͱ Їθʪ ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇϑ ͱ ͱиϑࡤ ߣ ϑϩɇ ʪ ʀͱͱ ࣛͱ ц ϑцϑϩʪ ࡥ ɇ ʒ Ї...
Страница 24: ... ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ и ɵʪ ʀͱ Їθʪʒ ϩͱ ɵʪ Їϑʪʒ ɇϑ ʀͱͱ ࣛͱ цࡥ ʀͱ Їθʪ ϩ ʪ ϩ ʪθ ͱϑϩɇϩ ɇϑ ͱ ͱиϑࡤ ߤ ϑϩɇ ʪ ʀͱͱ ࣛͱ ц ϑцϑϩʪ ɇ ʒ Їу ʪɇϩ ϩͱ k ʪθ ʪ ʀц ʪɇϩ Ã ɇ Ǯߣ ͱθ Ǯߤ ϑ ɇ ϑ ΧЇϩࡥ ϩ ʪ ɇ θ ʀͱ ʒ ϩ ͱ ʪθ ϩЇθ ϑ ͱ Ã ϩ ʪ ʒͱͱθ Ї ϩ ͱ ц ɇϑ ɇ ǽ ΧЇϩ ϩʪθ ɇ ࡥ ʀͱ ʪʀϩ ϩ ϩͱ ϩ ʪ ǽߣ ͱЇϩΧЇϩ ϩʪθ ɇ ϩ ʪ Ã ʒͱͱθ ϑʪʀϩ ͱ ͱ ϩ ʪ Ƹ Aͱ ϩθͱ Ƹ ϩ AƸ Ƹϑʪ ϩ ʪ ʪц ϑи ϩʀ ͱ ϩ ʪ ͱЇϩʒͱͱθ Ї ϩ ϩͱ ϑʪ ʪʀϩ Aͱͱ ͱ ц ɵʪ ͱθʪ Їϑ ϩ ʪ ϑцϑϩʪ Aͱ ʪʀϩ ͱ ͱ ϩ ʪ ʒʪ Ї ʒ ʀɇϩ ͱ ...
Страница 25: ...it or thermostat does not have a fan delay time during defrost control cold wind prevention control and fan off delay setting options and the motor is controlled via the G1 G2 G3 terminals it is recommended that settings be configured as follows Options Option settings Heat dissipation time Fan delaytime during defrost control and cold wind prevention control DIP SW3 19 Off DIP SW3 20 On 10 second...
Страница 26: ...xiliary heat furnace default SW1 3 ʪɇϩ ϑͱЇθʀʪϑ ͱΧϩ ͱ Ǯߤ ࠌࣕ On Auxiliary heat Off Emergency heat Default SW1 4 to1 8 Reserved SW2 9 SW2 10 Fan step control On On Disable Off On ߥ ϑϩʪΧ ɇ ϑΧʪʪʒ ʀͱ ϩθͱ ͱθ ߣ ϑϩɇ ʪ ϩ ʪθ ͱϑϩɇϩϑ ǽ ʀͱ ʪʀϩ ͱ ͱ ц ࠍࣕ On Off ߥ ϑϩʪΧ ɇ ϑΧʪʪʒ ʀͱ ϩθͱ ͱθ ߤ ϑϩɇ ʪ ϩ ʪθ ͱϑϩɇϩϑ ǽߣ ɇ ʒ ǽߤ ʀͱ ʪʀϩ ͱ ࠎࣕ Off Off Disable Default SW2 11 Aͱ ʒ и ʒ ΧθʪЭʪ ϩ ͱ ࠏࣕ On Disable Off Enable Default SW2 ...
Страница 27: ... On Disable Off Enable Default SW2 15 2 16 Reserved SW3 17 3 18 Reserved SW3 19 SW3 20 ɇ ʒʪ ɇц ϩ ʪ ʒЇθ ʒʪ θͱϑϩ ʀͱ ϩθͱ ɇ ʒ ʀͱ ʒ и ʒ ΧθʪЭʪ ϩ ͱ ʀͱ ϩθͱ ࠒࣕ On On 15 seconds Off On 10 seconds On Off 5 seconds Off Off 0 seconds Default SW3 21 SW3 22 ɇ ͱ ʒʪ ɇц ࠓࣕ On On 90 seconds Off On 60 seconds On Off 30 seconds Off Off 0 seconds Default SW3 23 3 24 Reserved K1 Reset ࡒ Referto page13 to 24 forWiring di...
Страница 28: ...ps operation 2 Heat sources option W2 SW1 3 If the thermostat outputs stage 2 auxiliary heater signals set SW1 3 to On If the thermostat outputs an Emergency heat signal set SW1 3 to Off CAUTION If SW1 1 is set to Heat pump and SW1 2 is set to Off there is no W2 signal input or output in the AHU Control Unit ACU 3 3 step fan speed control for 1 stage thermostats Y connection only SW2 9 and 2 10 Th...
Страница 29: ...es to 290 psi or more during the initial stage of heating operation When this feature is activated the fan will remain idle for a maximum of 5 minutes CAUTION When set to enable this feature is activated when the compressor starts operation in heating mode to keep the fan off while the compressor is operating Once the compressor starts operation the fan is kept off during the control regardless of...
Страница 30: ...e heat exchanger and heater during the set period of time to prevent the heat exchanger or heater from overheating and to remove residual heat in the heater If the indoor unit does not have this feature or if the fan is controlled via the G1 G2 G3 terminals it is recommended that the delay time be set to 10 seconds If the indoor unit or thermostat has this feature and you turn on this feature the ...
Страница 31: ...31 English Appendix Referto the outdoorunit installation manual forinformation regarding troubleshooting Troubleshooting ...
Страница 32: ......
