Carrier bryant Multi-Zone 38MARBQ09 18AA3 Series Service Manual

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Carrier Enterprise

Carrier & Bryant Ductless

Service Manual

Pub. Date – 6.25.2021

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Summary of Contents for Carrier bryant Multi-Zone 38MARBQ09 18AA3 Series

Page 1 Carrier Enterprise Carrier & Bryant Ductless Service Manual Pub. Date – 6.25.2021...
Page 2 Table of Contents Pages 4 ~ 6 Steps in Ductless (DLS)Troubleshooting Error Page Description All Models 40MBD Ducted Water Level 40MAQ High Wall Fan Error 40MBD Ducted Fan Error 40MBQ Ducted Fan Error E4/E5 40MAQ High Wall Sensor Error 40MBD Ducted Sensor Error 40MBQ Ducted Sensor Error 40MBC Cassette Sensor Error 40MBF Floor/Ceiling Sensor Error...
Page 3: Table Of Contents
Table of Contents (end) Service Procedures How Ohm a Reactor Compressor Check 1 – How to Meg a Compressor Compressor Check 2 – Ohming a Compressor 38MGR Error Code Retrieval Heating & Cooling Compensation Service Settings – Wireless Remote RG10 Service Settings –...
Page 4 Steps for DLS Troubleshooting If error is already displayed, make note of it. If Multi-Zone check each Indoor Unit for error. If no error displayed, wait up to 5 minutes for error to reappear. Some errors are constant retry and will only appear every 3 to 5 minutes to display again. During this time either a normal display or an “88”...
Page 5 Steps for DLS Troubleshooting (cont.) If system has no error but still not preforming well, remove the refrigerant charge (weighing it out) and recharge the system. Make sure to check the additional charge calculation if one is needed. If the end user’s complaint is related to over or under shooting temperature of the space, the sizing of the equipment to the application should be checked.
Page 6 CE or online. • A spare wireless remote control, part numbers: RG57 – 17317000A34063 RG10 – 17317000A59628 RG66 – 17317000A45681 • Support material from CE or Carrier. Service Manuals, Product Data. Download to your electronic device before going to the site.
Page 7 All Models Indoor Outdoor Unit Communication Error E1 (page 1 of 3) Error Code E1 – Indoor / Outdoor Unit Communication Error Indoor Unit or Wired Control Display – E1 Dr. Smart Display (Debugger) – E1 Malfunction decision conditions The indoor unit cannot communicate with the outdoor unit Supposed Causes •...
Page 8 All Models Indoor Outdoor Unit Communication Error E1 (page 2 of 3) Under normal operation voltage will alternate from approximately -50 Volts to +50 Volts. If your meter has a MIN/MAX setting, we recommend using this. It can quickly show you the top and bottom of the alternating range.
Page 9 All Models Indoor Outdoor Unit Communication Error E1 (page 3 of 3) Check the wiring connection from outdoor terminal to outdoor For ODU’s with only 1 PCB PCB and wiring between PCB’s if there is more than 1 PCB For ODU’s with 2 PCB’s, Check that the main and IPM (Inverter).
Page 10 40MBDQ09~58--3 Ducted Water Level Alarm EE Error Code EE – Water Level Switch Activated Indoor Unit or Wired Control Display Dr. Smart Display (Debugger) No Error Displayed Malfunction decision conditions If the sampling voltage is not 5V Supposed Causes • Drain clogged •...
Page 11 40MAQ High Wall Indoor Fan Error – E3 (page 1 of 2) Error Code E3 – Indoor Fan Problem Indoor Unit or Wired Control Display – E3 Dr. Smart Display (Debugger) – E3 Malfunction decision conditions When the indoor fan speed is too slow (300 RPM or less) for 3 minutes or more, the unit stops and the LED displays the Error Code for 30 seconds.
Page 12 40MAQ High Wall Indoor Fan Error – E3 (page 2 of 2) Turn ON power 1 - Red 3 - Black 4 - White Set your multimeter to Volts DC 5 - Yellow and carefully measure voltage 6 - Blue between PINs 1 - 3 &...
Page 13 40MBDQ09~58--3 Ducted Indoor Fan Error – E3 (page 1 of 2) Error Code E3 – Indoor Fan Problem Indoor Unit or Wired Control Display – E3 Dr. Smart Display (Debugger) – E3 Malfunction decision conditions When the indoor fan speed is too slow (300 RPM or less) for 3 minutes or more, the unit stops and the LED displays the Error Code for 30 seconds.
Page 14 40MBDQ09~58--3 Ducted Indoor Fan Error – E3 (page 2 of 2) Reactor Fan Inverter PCB is under Main PCB. Turn OFF power to outdoor unit. Remove 2 screws underneath and carefully lean out top assembly to change Inverter PCB.
Page 15 40MBQB09~48--3 Ducted Indoor Fan Error – E3 (page 1 of 2) Error Code E3 – Indoor Fan Problem Indoor Unit or Wired Control Display – E3 Dr. Smart Display (Debugger) – E3 Malfunction decision conditions When the indoor fan speed is too slow (300 RPM or less) for 3 minutes or more, the unit stops and the LED displays the Error Code for 30 seconds.
Page 16 40MBQB09~48--3 Ducted Indoor Fan Error – E3 (page 2 of 2) Turn OFF power to outdoor unit before Serving. Fan Inverter (Driver) PCB is located in Blower section of the indoor unit. Reactor Access through back return of unit Fan Inverter (Driver) PCB...
Page 17 MAQ High Wall, MBD/MBQ Ducted, MBF Floor, MBC Cassette Sensor Error E4 / E5 (page 1 of 3) Error Code E4 / E5 – Sensor Problem Indoor Unit or Wired Control Display Dr. Smart Display (Debugger) E4 / E5 E60 / E61 Malfunction decision conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure.
Page 18 MAQ High Wall, MBD/MBQ Ducted, MBF Floor, MBC Cassette Sensor Error E4 / E5 (page 2 of 3) If the resistance value is close to the chart consider the sensor good. Continued on next page...
Page 19 MAQ High Wall, MBD/MBQ Ducted, MBF Floor, MBC Cassette Sensor Error E4 / E5 (page 3 of 3) Temperature Sensor Resistance Value Table for; Return Air T1 & Evap. Coil T2...
Page 20 38MAQB18~48K, 38MAQB09~36R—3, 38MARBQ09~36AA3 Outdoor Units Sensor Error F1 / F2 / F3 (page 1 of 4) Error Code F1 / F2 / F3 – Sensor Problem Indoor Unit or Wired Control Display Dr. Smart Display (Debugger) F1 / F2 / F3 E5 &...
Page 21 38MAQB18~48K, 38MAQB09~36R—3, 38MARBQ09~36AA3 Outdoor Units Sensor Error F1 / F2 / F3 (page 2 of 4) If the resistance value is close to the chart consider the sensor good. Continued on next page...
Page 22 38MAQB18~48K, 38MAQB09~36R—3, 38MARBQ09~36AA3 Outdoor Units Sensor Error F1 / F2 (page 3 of 4) Temperature Sensor Resistance Value Table for; Outdoor Ambient T4 & Cond. Coil Temp T3 Continued on next page...
Page 23 38MAQB18~48K, 38MAQB09~36R—3, 38MARBQ09~36AA3 Outdoor Units Sensor Error F3 (page 4 of 4) Temperature Sensor Resistance Value Table for Compressor Discharge Sensor TP (T5)
Page 24 38MAQB18~30K Outdoor Unit Outdoor Fan Error – F5 (page 1 of 2) Error Code F5 – Outdoor Fan Problem Indoor Unit or Wired Control Display – F5 Dr. Smart Display (Debugger) – E7 & E71 Malfunction decision conditions When the Outdoor fan speed is too slow (300 RPM or less) for 3 minutes or more, the unit stops and the LED displays the Error Code for 30 seconds.
Page 25 38MAQB18~30K Outdoor Unit Outdoor Fan Error – F5 (page 2 of 2) Turn ON power 1 - Red 3 - Black 4 - White Set your multimeter to Volts DC 5 - Yellow 6 - Blue and carefully measure voltage between PINs 1 - 3 &...
Page 26 38MAQB09~36R--3 Outdoor Units Outdoor Fan Error F5 Error Code F5 – Outdoor Fan Problem Indoor Unit or Wired Control Display – F5 Dr. Smart Display (Debugger) – E7 & E71 Malfunction decision conditions When the indoor fan speed is too slow (300 RPM or less) for 3 minutes or more, the unit stops and the LED displays the Error Code for 30 seconds.
Page 27 Free up, replace any broken Rotate the Indoor fan by hand. parts so fan spins freely Does the fan rotate freely? Carrier Factory Authorized Parts 38AQ680001 Conductive Grease 18K ONLY - Ohm out reactor, remove wires first. Reading should be close to Zero between terminals.
Page 28 All Single Zone Outdoor Units Inverter Compressor Drive Error P4 Error Code P4 – Compressor and/or Inverter Problem Indoor Unit or Wired Control Display – P4 Dr. Smart Display (Debugger) – P4, P43 Malfunction decision conditions An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection and compressor rotation speed signal detection.
Page 29 Reactor Check – Ohming a Reactor Different styles of Reactors in Ductless Equipment Two checks should be done when testing a Reactor. The first step for both tests is to isolate the reactor, either by removing the wires directly from the Reactor or separating the wire harness if available.
Page 30: Compressor Check 1 - How To Meg A Compressor
Compressor Check 1 – How Meg a Compressor Shown here is a basic Megger Meter. • 2 Leads • 1 Meg Test Setting • 1 Ohm Setting • 1 Continuity Setting Disconnect Power to ODU. Ground the Black Lead directly to compressor shell. Attach Red Lead to one of the three terminals.
Page 31: Compressor Check 2 - Ohming A Compressor
Compressor Check 2 – Ohming a Compressor Input Terminal Blue Blue Black Black No combination should equal 0 or Open. All combinations should show a resistance value and each of the three values should be very close to each other.
Page 32: 38Mgr Error Code Retrieval
38MGR Error Code Retrieval • Push SW1 (ODU PCB) to check the unit’s status while running. The digital display displays codes each time the SW1 is pressed. • For the last error code, press 45 times. • Error code will display on the digital display. •...
Page 33 38MGR Diagnostic Codes...
Page 34: Heating & Cooling Compensation
24-Volt Interface does not utilize F2 & F7 settings to achieve set point, but do use these settings internally for compressor and EEV values during operation. When Carrier DLS controls are set to F or C degree, you will see a rounded value on the display.
Page 35 Heating & Cooling Compensation Examples of how the Heating Compensation setting moves the entire swing up or down. Default F2 for all High Wall Units: Heat Mode – High Wall – 40MHH F2 = +2C 40MAHB/619AHB 40MPHA/619PHA 73°(72.5°)(22.5C) T1 Return Sensor +0.9°(0.5C) 71.6°(22C) 68°(20C)
Page 36 Heating & Cooling Compensation Examples of how the Cooling Compensation setting moves the entire swing up or down. Default F7 for AHB & PHA High Wall Units: Cool Mode – 40MAHB/40MPHA F2 = 0C 619AHB/619PHA 73°(72.5°)(22.5C) T1 Return Sensor & Set +0.9°(0.5C) Point 72°(71.6)(22C) -6.3°(3.5C)
Page 37: Service Settings - Wireless Remote Rg10
Service Settings – Wireless Remote RG10 Service Settings are only accessible through the wireless remote control. Caution: Read and understand the function changes you wish to make in advance. The remote will not read the parameters in the unit. While many settings can be accessed, we find only the ones listed below may need adjustment from default.
Page 38 Service Settings – Wireless Remote RG10 (end) Service Settings are only accessible through the wireless remote control. Default Values for Service Settings Automatic Airflow Adjustment As of 5/2021 The RG10 Remote Service Manual has not been released.
Page 39: Service Settings - Wireless Remote Rg57
Service Settings – Wireless Remote RG57 Service Settings are only accessible through the wireless remote control. Caution: Read and understand the function changes you wish to make in advance. The remote will not read the parameters in the unit. While many settings can be accessed, we find only the ones listed below may need adjustment from default.
Page 40 Service Settings – Wireless Remote RG57 (end) Service Settings are only accessible through the wireless remote control. Default Values for Service Settings Automatic Airflow Adjustment As of 4/2021 Automatic Airflow Adjustment is not listed in the Remote Service Manual.
Page 41: Service Settings - Wireless Remote Rg66
Service Settings – Wireless Remote RG66 Service Settings are only accessible through the wireless remote control. Caution: Read and understand the function changes you wish to make in advance. The remote will not read the parameters in the unit. While many settings can be accessed, we find only the ones listed below may need adjustment from default.
Page 42 Service Settings – Wireless Remote RG66 (end) Service Settings are only accessible through the wireless remote control. Default Values for Service Settings...
Page 43: 38Marbq09~18Aa3 Outdoor Units
38MARBQ09~18AA3 Outdoor Units Control Box & Main PCB Removal (page 1 of 3) 9K, 12K (120 & 220-Volt) 18K, Helpful Hint! Replace Entire Control Box Assembly Take a picture or two of the wires to help when reinstalling. 18K ONLY 24K, 30K, 36K ONLY All Sizes Continued on next page...
Page 44 38MARBQ09~18AA3 Outdoor Units Control Box & Main PCB Removal (page 2 of 3) PCB Removal for 9, 12 & 18K Units Turn Power OFF First! Open top cover of unit. Remove all wires from side trays Remove screws holding Continued on Control Box next page...
Page 45 38MARBQ09~18AA3 Outdoor Units Control Box & Main PCB Removal (page 3 of 3) PCB Removal for 9, 12 & 18K Units Lean Control box out while you disconnect all wire harnesses. Some connections have small keepers holding them in place, these do not have to be reinstalled.
Page 46: 38Marbq24~36Aa3 Outdoor Units
38MARBQ24~36AA3 Outdoor Units Control Box & Main PCB Removal (page 1 of 5) Helpful Hint! 24K, 30K, 36K Replace Main PCB ONLY Take a picture or two of the wires to help when reinstalling. 18K ONLY 24K, 30K, 36K ONLY All Sizes 24, 30 &...
Page 47 38MARBQ24~36AA3 Outdoor Units Control Box & Main PCB Removal (page 2 of 5) PCB Removal for 24, 30 & 36K Units Turn Power OFF First! Open electrical connection, top and front cover of unit. Disconnect all wire harnesses, most have a short extension that you can separate instead of trying to disconnect directly from the PCB.
Page 48 38MARBQ24~36AA3 Outdoor Units Control Box & Main PCB Removal (page 3 of 5) PCB Removal for 24, 30 & 36K Units Open Top and front of Outdoor Unit, left tab to remove cover Remove 6 screws circled in Green, Remove wires from side trays Continued on next page...
Page 49 38MARBQ24~36AA3 Outdoor Units Control Box & Main PCB Removal (page 4 of 5) PCB Removal for 24, 30 & 36K Units Carefully lift off from the back first, working around the sides. When is it colder outside, the separation can be more difficult. Disconnect any remaining connected wires as you remove.
Page 50 Control Box & Main PCB Removal (page 5 of 5) PCB Removal for 24, 30 & 36K Units Clean off old Conductive Grease and apply new before reassembling. Some wires will be reused when replacing PCB. Carrier Factory Authorized Parts 38AQ680001 Conductive Grease...
Page 51: 38Maqb09~12R--3 Outdoor Units
38MAQB09~36R--3 Outdoor Unit Inverter & Main PCB Removal (page 1 of 4) Turn Power OFF First! Helpful Hint! Take a picture or two of the wires to help when reinstalling. Open electrical connection, top and front cover of unit. Continued on next page...
Page 52 38MAQB09~36R--3 Outdoor Unit Inverter & Main PCB Removal (page 2 of 4) Remove screw. Disconnect all wire harnesses that connects to the Main PCB, most have a short extension that you can separate instead of trying to disconnect directly from the PCB. Remove Screw 1 Some connections have small keepers holding...
Page 53 38MAQB09~36R--3 Outdoor Unit Inverter & Main PCB Removal (page 3 of 4) Reach in and up to disconnect Red, Black & Yellow ¼” spade connections Remove Ground wire to Main PCB Continued on next page...
Page 54 38MAQB09~36R--3 Outdoor Unit Inverter & Main PCB Removal (page 4 of 4) Carefully lift up from these two areas, guiding the loose wires up and out at the same time. Reverse steps to reinstall. Some wires will be reused if replacing either PCB.
Page 55 38MAQB09~12---1 Outdoor Unit Main PCB Removal (page 1 of 3) For Sizes 9K & 12K 120 Volt Turn Power OFF First! Helpful Hint! Take a picture or two of the wires to help when reinstalling. Open electrical connection and top cover of unit.
Page 56 38MAQB09~12---1 Outdoor Unit Main PCB Removal (page 2 of 3) For Sizes 9K & 12K 120 Volt Remove screws circled in Red. Lift electrical box out carefully disconnecting wire harnesses along the way.
Page 57 38MAQB09~12---1 Outdoor Unit Main PCB Removal (page 3 of 3) For Sizes 9K & 12K 120 Volt Some wires will be reused Reverse steps to reinstall. when replacing PCB.
Page 58 38MAQB09~12---3 Outdoor Unit Main PCB Removal (page 1 of 3) For Sizes 9K & 12K 208/230 Volt Turn Power OFF First! Helpful Hint! Take a picture or two of the wires to help when reinstalling. Open electrical connection and top cover of unit.
Page 59 38MAQB09~12---3 Outdoor Unit Main PCB Removal (page 2 of 3) For Sizes 9K & 12K Remove screws circled in Red. Lift electrical box out carefully disconnecting Compressor and Inductor wire harnesses along the way.
Page 60 38MAQB09~12---3 Outdoor Unit Main PCB Removal (page 3 of 3) For Sizes 9K & 12K Remove remaining wires harness in Blue. Some wires will be reused Reverse steps to reinstall. when replacing PCB.
Page 61 38MAQB18~30---3 Outdoor Unit Inverter & Main PCB Removal (page 1 of 4) For Sizes 18K, 24K, 30K Turn Power OFF First! Helpful Hint! Take a picture or two of the wires to help when reinstalling. Open electrical connection, top and front cover of unit. Continued on next page...
Page 62 38MAQB18~30---3 Outdoor Unit Inverter & Main PCB Removal (page 2 of 4) For Sizes 18K, 24K, 30K Lift off PCB electrical box cover and remove screws circled in Red. Disconnect any wires leading to the Inverter PCB, see Blue. Inverter PCB Main PCB Some connections have small keepers holding them in place, these do not have to be reinstalled.
Page 63 38MAQB18~30---3 Outdoor Unit Inverter & Main PCB Removal (page 3 of 4) For Sizes 18K, 24K, 30K Carefully lift up Inverter PCB off, guiding the loose wires up and out at the same time. Factory Authorized Parts™ 38AQ680001 Conductive Grease Some wires will be reused if replacing Inverter PCB.
Page 64: 38Maqb18~30
38MAQB18~30---3 Outdoor Unit Inverter & Main PCB Removal (page 4 of 4) For Sizes 18K, 24K, 30K Remove wires first, then carefully push tabs out holding the PCB to release it.
Page 65 38MGR30 Outdoor Unit Control Box & Main PCB Removal (page 1 of 5) PCB Removal for 30K Units Turn Power OFF First! Open electrical connection, top and front cover of unit. Continued on next page...
Page 66 38MGR30 Outdoor Unit Control Box & Main PCB Removal (page 2 of 5) PCB Removal for 30K Units Cut and remove some of the zip ties that help secure the excess wire in place. Disconnect all wire harnesses, most have a short extension that you can separate instead of trying to disconnect directly from the PCB.
Page 67 38MGR30 Outdoor Unit Control Box & Main PCB Removal (page 3 of 5) PCB Removal for 30K Units Remove PCB Ground wire from screw. Carefully lift up from these two areas, guiding the loose wires up and out at the same time. Disconnect the Electronic Expansion Valve, making note A to D, Right to Left.
Page 68 38MGR30 Outdoor Unit Control Box & Main PCB Removal (page 4 of 5) PCB Removal for 30K Units When the PCBs are lifted up a little, disconnect the Fan wires, making note A to D, Front to Back. Also at this point, disconnect the Red & Black wires going to L1 &...
Page 69 38MGR30 Outdoor Unit Control Box & Main PCB Removal (page 5 of 5) PCB Removal for 30K Units Some wires will be reused if replacing Reverse steps to reinstall. either PCB. Also at this point , disconnect the Red & Black wires going to L1 &...
Page 70 This guide was made by Carrier Northeast Technical Services Department. Information within is subject to change...

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Carrier bryant Multi-Zone 38MARBQ09 18AA3 Series Service Manual

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