Page 1 Service manual VRV system air conditioner VAM350J8VEB EKVDX32A2VEB VAM500J8VEB EKVDX50A2VEB VAM650J8VEB EKVDX80A2VEB VAM800J8VEB EKVDX100A2VEB VAM1000J8VEB VAM1500J8VEB VAM2000J8VEB...
Page 2 The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein.
Page 3 Version log Version log Version code Description Date ESIE22-07 Document release September 2022 VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 4 Table of Contents Table of Contents 1 Safety precautions Meaning of warnings and symbols..........................Dangers ................................... Warnings ..................................Cautions ..................................14 Notices .................................... 14 2 General operation 3 Troubleshooting To retrieve error codes and check error history ......................20 3.1.1 Via the indoor unit remote controller BRC1H ....................
Page 5 Table of Contents 3.2.53 65-03 – Low outdoor air temperature......................57 3.2.54 6A-00 – Damper related malfunction ......................57 Symptom based troubleshooting ........................... 59 3.3.1 Symptom: The system does not operate....................... 59 3.3.2 Symptom: White mist comes out of a unit (Indoor unit) ................59 3.3.3 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)............
Page 6 Table of Contents 5.3.2 Repair procedures ............................169 External factors ................................170 5.4.1 Checking procedures ............................170 6 Maintenance Maintenance for heat reclaim ventilation units......................171 6.1.1 Maintenance safety precautions ........................171 6.1.2 Checklist for maintenance of the heat reclaim ventilation unit..............172 6.1.3 Maintenance of the air filter ..........................
Page 7 Safety precautions 1 Safety precautions The precautions described in this document cover very important topics, follow them carefully. All activities described in the service manual must be performed by an authorized person. If you are NOT sure how to install, operate or service the unit, contact your dealer. In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods, …...
Page 8 Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Do NOT apply any permanent inductive or capacitance loads to the circuit without ensuring that this will NOT exceed the permissible voltage and current permitted for the equipment in use.
Page 9 WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). WARNING Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other substances.
Page 10 Safety precautions WARNING Make sure the total refrigerant charge is in accordance with the room size in which the unit is installed: please consult the detailed instructions on charging and allowed room sizes in the installation manual. WARNING ▪ NEVER mix different refrigerants or allow air to enter the refrigerant system. ▪...
Page 11 Safety precautions WARNING ▪ In order to prevent oxygen deficiency and R32 combustion, keep the room well- ventilated for a healthy work environment. Do NOT work in a confined space. If a refrigerant leak is detected in a confined room or an inadequately ventilated location, do NOT start the work until the area has been ventilated appropriately.
Page 12 Safety precautions WARNING ▪ The area MUST be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. ▪ Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e.
Page 13 Safety precautions WARNING Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire. WARNING Prior to start working on systems containing flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
Page 14 Safety precautions 1.4 Cautions CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. CAUTION To avoid injury, do NOT touch the air inlet or aluminium fins of the unit. CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪...
Page 15 General operation 2 General operation The EKVDX is an airconditioning unit for pretreatment of incoming supply air from a VAM heat reclaim ventilation unit. For comfort temperature control, it is still required to install a normal indoor unit. Do not place the EKVDX before the heat reclaim ventilation unit. INFORMATION The following figures are just examples and may NOT completely match your system layout.
Page 16 General operation 2‒2 For VAM1500+2000 and EKVDX100 a Heat reclaim ventilation unit (VAM) b EKVDX indoor unit c Outdoor unit d User interface e Air inlet duct for EKVDX indoor unit f Discharge air g Duct flange(s) h Drain pipe i Refrigerant piping + transmission cable The EKVDX-A DX coil module is a unit based on the FXSA-A VRV indoor unit (without its fan).
Page 17 General operation EKVDX-A/VAM-J8 is a fresh air pre‑treatment solution. Please keep in mind that this is NOT a comfort solution. It CAN be connected to a VRV IV, VRV IV+ or VRV5 Outdoor Unit. There are some exception for combinations due to R32 safety, such as VAM350J8 and EKVDX32A2 combination is NOT allowed, these combination rules are present in the Databook.
Page 18 General operation ▪ Correction factor CAN be set by field setting 20-13. Default setting is 0. CF CAN be set in range 0~7 with increments of 0.5. ▪ Example: Remote controller is set to Cooling and temperature is set to 19°C. R5T (discharge temperature) is 19°C but we expect that air will reach the room at 21°C due to heat losses in the ducting.
Page 19 General operation BRC1H52/82* is the dedicated remote controller for R32 units. In case of VRV R32 and BRC1H51/81 is used, U5-04 error will be triggered. No more than 1 pair of EKVDX-A/VAM CAN be connected through P1/P2 wiring. EKVDX-A/VAM is ALSO compatible with VRV IV and VRV IV+, in this case a field setting is required at VAM and EKVDX-A unit to indicate system is R410A.
Page 20 Images are in English and for reference ONLY. For more details on the Madoka Assistant please refer to the BRC1H training course material which is available on the Daikin Business Portal. To retrieve the error code To indicate a system error, the controller displays on the messages zone of the home screen.
Page 21 Troubleshooting 3 Tap the active error. Result: The detail(s) of the error(s) are shown on the Notifications screen. To check the error history To check the error history with the Madoka Assistant for BRC1H: Action Image for reference Result Tap the settings icon. The Unit settings screen is displayed.
Page 22 Troubleshooting 3.2 Error based troubleshooting 3.2.1 A0-00 – External protection device activated EKVDX-A units Trigger Effect Reset T1‑T2 input is ON and Unit will stop operating Auto reset. field setting 22-1=3. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check if the field setting 22-1 is correctly set according to the following wiring situations on T1‑T2 of X1M terminal of the indoor unit.
Page 23 Troubleshooting Possible cause: External source may cause interference. 5 Perform a check of the indoor unit main PCB. See "4.8 Indoor unit main PCB" [ 112]. Possible cause: Faulty indoor unit main PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 24 Troubleshooting 5 Check if any external (foreign) vapor substance influenced the functioning of the R32 leak detection sensor. Repair as needed. Possible cause: External (foreign) vapor substance reacted with R32 leak detection sensor. 6 Perform a check of the indoor unit main PCB. See "4.8 ...
Page 25 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the power supply to the indoor unit. See "5.1 Electrical circuit" [ 164]. Possible cause: ▪ Faulty or disturbance of the power supply (imbalance), ▪...
Page 26 Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.6 A6-01-02-05-06 – Fan motor abnormality - motor lock VAM-J8 units Trigger Effect Reset Fan speed does NOT rise Units will stop operating. Remote controller reset.
Page 27 Troubleshooting 3.2.7 A6-10-12-14-16 – Fan motor abnormality - overcurrent or IPM protection VAM-J8 units Trigger Effect Reset PCB detects too high Units will stop operating. Remote controller reset. current. Sub code Unit Fan motor Fan PCB VAM350~650J8 Supply air VAM800+1000J8 Supply air VAM1500+2000J8 Supply air (bottom)
Page 28 Troubleshooting 3.2.8 A6-11-13-15-17 – Fan motor abnormality - position detection error VAM-J8 units Trigger Effect Reset While unit is running: Units will stop operating. Remote controller reset. actual rotation speed by Hall IC sensor on fan motor <fan step command by PCB or no position signal from Hall IC sensor.
Page 29 Troubleshooting 3.2.9 A6-22 – Unstable fan rpm VAM-J8 units Trigger Effect Reset Fan PCB detects irregular Unit will NOT stop Auto reset. fan rpm signals. operating. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the power supply to the indoor unit.
Page 30 Troubleshooting Possible cause: Incorrect field settings. 2 Check that the ducting is compliant with the installation limits. See installer reference guide. Possible cause: Ducting is incorrect, too long or has incorrect size. 3 Clean the air filter of the indoor unit(s). See "6 Maintenance" [ 171].
Page 31 Troubleshooting 4 Perform a check of the indoor air thermistor. See "4.14 Thermistors" [ 154]. Possible cause: Faulty indoor air thermistor. 5 Perform a check of the outdoor air thermistor. See "4.14 Thermistors" [ 154]. Possible cause: Faulty outdoor air thermistor. 6 Perform a check of the indoor unit fan motors. See "4.5 ...
Page 32 Troubleshooting 7 Perform a check of the indoor unit fan PCBs. See "4.6 Indoor unit fan PCB" [ 97]. Possible cause: Faulty indoor unit fan PCB. 8 Perform a check of the indoor unit main PCB. See "4.8 Indoor unit main PCB" [ 112].
Page 33 Troubleshooting 3.2.14 A9-01 – Y1E Expansion valve coil abnormality EKVDX-A units Trigger Effect Reset Upon power reset, Y1E Unit will stop operating. Power reset of indoor expansion valve coil is unit. NOT detected. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the power supply to the indoor unit.
Page 34 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the power supply to the indoor unit. See "5.1 Electrical circuit" [ 164]. Possible cause: ▪ Faulty or disturbance of the power supply (imbalance), ▪...
Page 35 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check for excess water level in the drain pan. Check drain connector to the common drain pipe, and make sure minimum height is respected. Empty the drain pan and correct installation of drain piping as needed.
Page 36 Troubleshooting 2 Perform a power reset. If the error disappears and is raised again after a while, check for the presence of an external source causing electrical noise. "5.4 External factors" [ 170]. Possible cause: External source may cause interference. 3 Check if the correct spare part is installed for the indoor unit main PCB. See "4.8 ...
Page 37 Troubleshooting 3.2.19 C1-00 – Communication abnormality between main PCB and fan PCB Trigger Effect Reset When normal Unit will stop operating. Power reset. transmission between main PCB and fan PCB is NOT conducted for a certain duration (15 seconds or more). To solve the error code 1 Perform power reset.
Page 38 Troubleshooting 3.2.21 C5-00 – Gas thermistor abnormality EKVDX-A units Trigger Effect Reset Indoor unit gas thermistor Unit will stop operating. Auto reset. read‑out is out of range. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the indoor unit refrigerant gas thermistor.
Page 39 Troubleshooting 1 Depending on your unit, check if the correct spare part is installed for the appropriate indoor unit fan PCB (see table above). See "4.6 Indoor unit fan PCB" [ 97]. Possible cause: Incorrect spare part PCB. 2 Check if the correct spare part is installed for the indoor unit main PCB. See "4.8 ...
Page 40 Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.24 C6-05-15-25-35 – Fan PCB EEPROM error VAM-J8 units Trigger Effect Reset EEPROM error detected Units will stop operating. Power reset. on fan PCB.
Page 41 Troubleshooting Sub code Unit Fan PCB VAM350~650J8 VAM800+1000J8 VAM1500+2000J8 VAM350~650J8 VAM800+1000J8 VAM1500+2000J8 VAM1500+2000J8 VAM1500+2000J8 To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Depending on your unit, perform a check of the appropriate indoor unit fan PCB (see table above).
Page 42 Troubleshooting 1 Depending on your unit, perform a check of the appropriate indoor unit fan PCB (see table above). See "4.6 Indoor unit fan PCB" [ 97]. Possible cause: Faulty indoor unit fan PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 43 Troubleshooting Possible cause: Faulty indoor unit main PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.29 CH-00 – CO2 sensor alarm VAM-J8 units Trigger Effect Reset Optional CO sensor is Unit will continue Auto reset.
Page 44 Troubleshooting Possible cause: Faulty or damaged wiring between indoor unit main PCB and R32 leak detection sensor. 2 Check the error history for error code A0-11, see "3 Troubleshooting" [ 20]. If A0-11 is found, R32 leak detection sensor was replaced after this error and power reconnected.
Page 45 Troubleshooting 3 Perform a check of the R32 leak detection sensor of the faulty indoor unit. See "4.11 R32 leak detection sensor" [ 146]. Possible cause: Faulty R32 leak detection sensor. 4 Perform a check of the indoor unit main PCB. See "4.8 ...
Page 46 Troubleshooting 3.2.33 CH-10 – R32 leak detection sensor replacement to confirm EKVDX-A units Trigger Effect Reset The R32 sensor detected Indoor unit will stop ▪ field setting disconnection between operating. 25‑14‑01 to 02 on the indoor unit main PCB and remote controller of the R32 sensor.
Page 47 Troubleshooting 3.2.34 CJ-00 – Remote controller air thermistor abnormality EKVDX-A units Trigger Effect Reset Remote controller air Indoor unit will continue Auto reset. thermistor read‑out is out operating, using indoor of range. unit air thermistor as input. To solve the error code INFORMATION It is recommended to perform the checks in the listed order.
Page 48 Troubleshooting Possible cause: No main remote controller set when multiple units are wired to the same indoor unit. 2 Perform a check of the remote controller. See "4.13 Remote controller user interface" [ 152]. Possible cause: Faulty remote controller or faulty transmission wiring between remote controller and indoor unit.
Page 49 Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.37 U8-00 – Transmission error between Master and Slave remote controller VAM-J8 units Trigger Effect Reset Main PCB detects Unit will stop operating. Power reset.
Page 50 Troubleshooting 3.2.38 U9-01 – Other indoor unit has error EKVDX-A units Trigger Effect Reset System mismatch, Unit will continue Auto reset. non‑compatible indoor operation. units. At least one other indoor unit on same F1-F2 wiring has an error. To solve the error code INFORMATION It is recommended to perform the checks in the listed order.
Page 51 Troubleshooting 3.2.40 UA-00 – Wrong remote controller EKVDX-A and VAM-J8 units Trigger Effect Reset Wrong type of remote Unit will stop operating. Power reset. controller detected. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check the databook for compatible remote controllers.
Page 52 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. If all indoor units display error UE-00 1 See "Error based troubleshooting" in the outdoor unit service manual and proceed with the troubleshooting of this error code. If ONLY 1 indoor unit displays error UE-00 1 Check if the indoor unit has an assigned group address.
Page 53 Troubleshooting 3.2.44 UJ-35 – Abnormality at VAM unit EKVDX-A units Trigger Effect Reset Malfunction detected at Unit will stop operating. Power reset. VAM unit. To solve the error code 1 Check the error code at the VAM-J8 indoor unit. See "3.2 ...
Page 54 Troubleshooting To solve the error code 1 Check the VAM-J8 indoor unit for error code A6-28. See "3.2 Error based troubleshooting" [ 22] to solve the error code. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 55 Troubleshooting Possible cause: Faulty indoor unit main PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.49 64-01 – Indoor air thermistor malfunction VAM-J8 units Trigger Effect Reset Indoor air thermistor Unit will continue Auto reset.
Page 56 Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.2.51 65-01 – Outdoor air thermistor malfunction VAM-J8 units Trigger Effect Reset Outdoor air thermistor Unit will continue Auto reset. open or short‑circuit. operating.
Page 57 Troubleshooting 3.2.53 65-03 – Low outdoor air temperature VAM-J8 units Trigger Effect Reset Low outdoor ambient Unit will stop operating. Auto reset. temperature detected during filter contamination inspection function. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check that the field setting 29-0 is NOT set as 29-0=4 or 29-0=5.
Page 58 Troubleshooting Possible cause: Faulty limit switch. 2 Perform a check of the damper motor. See "4.1 Damper motor" [ 65]. Possible cause: Faulty damper motor. 3 Perform a power reset. If the error disappears and is raised again after a while, check for the presence of an external source causing electrical noise. "5.4 External factors" [ 170].
Page 59 Troubleshooting 3.3 Symptom based troubleshooting 3.3.1 Symptom: The system does not operate ▪ The air conditioner does not start immediately after the ON/OFF button on the user interface is pressed. If the operation lamp lights, the system is in normal condition.
Page 60 Troubleshooting ▪ A hissing sound which is heard at the start or immediately after stopping operation or defrost operation. This is the noise of refrigerant caused by flow stop or flow change. 3.3.7 Symptom: Dust comes out of the unit When the unit is used for the first time in a long time.
Page 61 Troubleshooting 3.3.9 Symptom: Unit operation problems Symptom Possible failure Root cause Repair Unit(s) do not operate Unit(s) do not operate Missing or abnormal power Check Power Supply. See supply (reverse phase, outdoor unit service missing phase, abnormal manual. voltage…) to the outdoor unit Indoor unit(s) do not Check power supply to the...
Page 62 Troubleshooting Symptom Possible failure Root cause Repair Operation stops and then Outdoor unit performing Retry mode triggered by an Check field setting 1-23, restarts after 3 minutes. 'retry' operation error 1-24, 1-25 for latest retry content. See Field settings in outdoor unit service manual.
Page 63 Troubleshooting Symptom Possible failure Root cause Repair Disturbing operation noise Faulty Inverter circuit Instable output voltage Check Power Supply, see and vibration output on main PCB from inverter circuit (on outdoor unit service main PCB) to manual. Restore the power compressor(s) supply in conform with the requirements.
Page 64 Troubleshooting Mode: Heating Low pressure High pressure Running current Air by-pass between air Higher than normal Higher than normal Higher than normal inlet/outlet @indoor unit Non condensables (i.e air) Higher than normal Higher than normal Higher than normal in refrigerant Moisture in refrigerant Lower than normal Lower than normal...
Page 65 Components 4 Components CAUTION When replacing a component ALWAYS make sure the correct spare part for your unit is installed. 4.1 Damper motor 4.1.1 Checking procedures To perform an electrical check of the damper motor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 66 Components a Screw b Damper assy 6 Carefully pull back the damper assembly. 7 Remove the screw and open (turn over) the damper motor cover. a Screw b Cover (damper motor) 8 Disconnect the wiring (Faston connectors) from the damper motor. 9 Measure the resistance between the pins of the connector on the damper motor.
Page 67 Components 1 Remove the screw from the side rail (supply air fan). a Screw b Side rail (supply air fan) 2 Remove the side rail from the unit. 3 Remove the 2 screws from the damper assembly. a Screw b Damper assy 4 Carefully pull back the damper assembly.
Page 68 Components a Screwdriver b Cam c Retaining spring 7 Remove the cam from the damper motor shaft. 8 Remove the screw and open (turn over) the damper motor cover. 9 Disconnect the wiring (Faston connectors) from the damper motor. a Damper motor cover b Faston connector c Damper motor d Screw...
Page 69 Components a Damper motor cover b Faston connector c Damper motor d Screw 3 Connect the wiring (Faston connectors) to the damper motor. 4 Route the wiring harness through the slot in the damper motor cover. 5 Install the damper motor cover in the correct location on the damper assembly.
Page 70 Components a Screw (damper arm) b Damper arm c Screw (damper motor cover) d Damper motor cover 10 Install the damper assembly in the correct location on the unit. Make sure the wiring harnesses (damper motor, limit switch) are correctly routed. 11 Install and tighten the 2 screws to fix the damper assembly.
Page 71 Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the damper motor wiring harness Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 72 Components a Screw b Cover (damper motor) 6 Disconnect the wiring (Faston connectors) from the damper motor. 7 Disconnect the damper motor connector from the indoor unit main PCB. 8 Route the damper motor wiring harness out of the switch box and out of the appropriate retainers.
Page 73 Components a Screw b Damper assy 7 Install the side rail (supply air fan) in the correct location on the unit. 8 Install and tighten the screw to fix the side rail. a Screw b Side rail (supply air fan) 9 Route the damper motor wiring harness through the appropriate retainers inside the switch box.
Page 74 Components 4.2 Drain pump 4.2.1 Checking procedures To perform an electrical check of the drain pump Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.10 Plate work" [ 134].
Page 75 Components Drain pump is operating correctly? Action Drain pump is OK. Return to troubleshooting of the specific error code and continue with the next procedure. Continue with the next step. DANGER: RISK OF ELECTROCUTION Do NOT touch any live parts or PCB's. 9 Measure the power supply voltage between the white and red wire of the drain pump connector X25A on the indoor unit main PCB.
Page 76 Components a Drain outlet pipe b Drain pump c Screw 7 Remove the 3 screws from the drain pump. 8 Remove the drain pump from the indoor unit. 9 To install the drain pump, see "4.2.2 Repair procedures" [ 75]. To install the drain pump 1 Install the drain pump in the correct location on the indoor unit.
Page 77 Components INFORMATION Replace all cable ties that were cut during removal. 8 Install the drain pan, see "4.10 Plate work" [ 134]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 78 Components Does the expansion valve open? Action Perform an electrical check of the expansion valve, see "4.3.1 Checking procedures" [ 77]. Replace the expansion valve body, see "4.3.2 Repair procedures" [ 80]. To perform an electrical check of the expansion valve 1 First perform a mechanical check of the expansion valve, see "4.3.1 Checking procedures" [ 77].
Page 79 Components a Connector 3 Check the insulation resistance of the coil by measuring the resistance between the pins of each phase (1, 2, 3, 4) and GND on the unit. Result: None of the measurements should be short‑circuit. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 80 Components INFORMATION If the PCB does NOT command the expansion valve to open or close (when it is supposed to), perform a check of the appropriate thermistors and pressure sensors (as their measurements control the operation of the expansion valve(s)). 7 While in opening or closing sequence each expansion valve winding (Ф1, 2, 3, 4) is supplied with 12 ...
Page 81 Components INFORMATION It may be needed to turn the expansion valve coil 1/8 turn counter clockwise to unlock it. Make sure to note the correct orientation (position) of the expansion valve coil before removal. a Expansion valve coil b Expansion valve body 4 Cut all tie straps that fix the expansion valve coil wiring harness.
Page 82 Components a Putty b Expansion valve pipe c Expansion valve body d Cooling‑clamps 6 Stop the nitrogen supply when the piping has cooled down. 7 Remove the expansion valve body. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 83 Components CAUTION Overheating the valve will damage or destroy it. 7 After soldering is done, stop the nitrogen supply after the component has cooled‑down. a Putty b Expansion valve pipe c Expansion valve body d Cooling‑clamps 8 Reinstall the putty (if applicable). 9 Perform a pressure test, see "5.2.1 Checking procedures" [...
Page 84 Components a Expansion valve coil b Expansion valve body 2 Route the expansion valve coil wiring harness through the appropriate harness retainers towards the indoor unit main PCB. 3 Connect the expansion valve coil connector to the appropriate PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 85 Components Is the measured voltage correct? Action Continue with the next step. Perform a check of the indoor unit main PCB, see "4.8.1 Checking procedures" [ 112]. 5 Turn OFF the respective circuit breaker. 6 Check that the float switch freely moves up and down and is NOT blocked. 7 Slide the float switch to the upwards (activated) position and measure the resistance between pins 1‑2 of the float switch connector.
Page 86 Components a Float switch b Support bracket 7 Remove the float switch from the indoor unit. 8 To install the float switch, see "4.4.2 Repair procedures" [ 85]. To install the float switch 1 Install the float switch in the correct location on the indoor unit. 2 Click the float switch on the support bracket.
Page 87 Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.5 Indoor unit fan motor 4.5.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the fan assembly Prerequisite: Stop the unit operation via the user interface.
Page 88 Components a Screw (connector box) b Fan motor connector box c Fan motor connector d Screw (fan motor assy) 5 Disconnect the fan motor connector. 6 Remove the 4 screws from the fan motor assembly. 7 Carefully remove (pull out) the fan motor assembly (including fan) from the unit.
Page 89 Components a Fan motor b Fan assy 2 Slowly rotate the fan assembly. Check that it rotates smoothly. 3 Check the friction of the DC fan motor shaft bearing. Is the DC fan motor shaft friction Action normal? Perform an electrical check of the DC fan motor assembly, see "4.5.1 Checking procedures" [...
Page 90 Components DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. INFORMATION Make sure that the wiring between the DC fan motor connector and the connector on the PCB is properly connected and NOT damaged (check continuity), see "7.2 Wiring diagram" [...
Page 91 Components 13 Measure the voltage between the connector wires Blue-Brown (= fan motor control) on the indoor unit fan PCB. Result: The voltage MUST be 15±10% V DC. Are both measured voltages correct? Action Continue with the next step. Perform a check of the indoor unit fan PCB, see "4.6.1 Checking procedures" [...
Page 92 Components 4 Turn ON the power of the unit. 5 Activate Fan ONLY operation via the user interface. 6 Check the functioning of the indoor unit fan. Indoor unit fan … Action Rotates continuously (without DC fan motor assembly is OK. Return to interruption) the troubleshooting of the specific error and continue with the next procedure.
Page 93 Components 11 Connect the DC fan motor connectors X1A and X2A to the indoor unit fan PCB. 12 Turn ON the power of the unit. CAUTION Ensure that the system CANNOT start the fan. Disable all modes (heating, cooling, …) on the unit.
Page 94 Components Pulses are measured during propeller Action fan rotation? Replace the DC fan motor, see "4.5.2 Repair procedures" [ 94]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 95 Components a Screw (connector box) b Fan motor connector box c Fan motor connector d Screw (fan motor assy) 6 Disconnect the fan motor connector. 7 Remove the 4 screws from the fan motor assembly. 8 Carefully remove (pull out) the fan motor assembly (including fan) from the unit.
Page 96 Components a Set screw b Fan c Fan motor d Screw (fan motor) e Motor base 3 Install the fan in the correct location on the fan motor shaft. 4 Install and tighten the set screws to fix the fan. 5 Install the fan motor assembly (including fan) in the correct location on the unit.
Page 97 Components a Screw b Side rail (supply air fan) c Side rail (exhaust air fan) d Polystyrene blind plate 11 Install the appropriate side rail in the correct location on the unit. 12 Install and tighten the screw to fix the side rail. Is the problem solved? Action No further actions required.
Page 98 Components A VAM350~650 a Connector X10A A VAM800~2000 a Connector X10A Does the indoor unit fan PCB receive Action power? Return to "4.6.1 Checking procedures" [ 97] of the indoor unit fan PCB and continue with the next procedure. Continue with the next step. 5 Check the power supply to the indoor unit, see "5.1.1 ...
Page 99 Components Is the power supply to the indoor unit Action correct? Correct the wiring between the power supply terminal of the indoor unit and the indoor unit fan PCB, see "4.6.2 Repair procedures" [ 107]. Adjust the power supply to the unit, see "5.1.2 Repair procedures" [ 167].
Page 100 Components Does the HAP LED blink in regular Action intervals (approximately 1 Hz)? Return to "4.6.1 Checking procedures" [ 97] of the indoor unit fan PCB and continue with the next procedure. Replace the indoor unit fan PCB, see "4.6.2 Repair procedures" [ 107]. To check if the correct spare part is installed Prerequisite: First perform all earlier checks of the indoor unit fan PCB, see "4.6.1 Checking procedures" [...
Page 101 Components 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. A VAM350~650 a Fuse F2U b Fuse F4U A VAM800~2000 a Fuse F3U Blown fuse on the indoor unit fan PCB? Action Replace the indoor unit fan PCB, see "4.6.2 Repair procedures" [ 107].
Page 102 Components To check the rectifier voltage of the indoor unit fan PCB Prerequisite: First perform all earlier checks of the indoor unit fan PCB, see "4.6.1 Checking procedures" [ 97]. 1 Turn ON the power of the unit. 2 Measure the voltage on the rectifier voltage check terminals (C+ and C-) on the indoor unit fan PCB.
Page 103 Components Is the measured rectifier voltage Action correct? Return to "4.6.1 Checking procedures" [ 97] of the indoor unit fan PCB and continue with the next procedure. Continue with the next step. 3 Perform a check of the reactor, see "4.12.1 Checking procedures" [ 150].
Page 104 Components a V DC out (+) b V AC in c V AC in d V DC out (–) INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. 0.45~0.55 V 0.45~0.55 V 0.45~0.55 V...
Page 105 Components DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 3 Check the diode module in reference with the image and the table below. a V DC out (+) b V AC in c V AC in...
Page 106 Components 3 Check the power module V2R in reference with the image and the table below. d C+ e C- INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. 0.405~0.495 V 0.405~0.495 V 0.405~0.495 V...
Page 107 Components 4.6.2 Repair procedures To correct the wiring from the indoor unit power supply terminal to the indoor unit fan PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.10 Plate work" [ 134].
Page 108 Components Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.10 Plate work" [ 134]. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 2 Unlatch all cable clamps of the connector wires and disconnect all connectors from the indoor unit fan PCB.
Page 109 Components INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "7.2 Wiring diagram" [ 177]. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 110 Components Is the problem solved? Action Return to "4.6.1 Checking procedures" [ 97] of the indoor unit fan PCB and continue with the next procedure. 4.7 Indoor unit heat exchanger 4.7.1 Checking procedures To perform a mechanical check of the indoor unit heat exchanger Prerequisite: Stop the unit operation via the user interface.
Page 111 Components 5 Cut the tie strap and remove the expansion valve coil from the expansion valve body. a Refrigerant pipe hold plate b Expansion valve coil c Screw d Heat exchanger 6 Remove the refrigerant liquid and gas thermistors from their holder or clip. If needed, remove the insulation.
Page 112 Components 5 Install the expansion valve coil on the expansion valve body. Install a new tie strap to fix the coil and wiring harness. 6 If applicable, install new tie straps to fix the wiring harnesses. 7 Make sure that the refrigerant field piping connections are clean and not damaged.
Page 113 Components a Indoor unit fan PCB b Screw c Mounting plate 3 Visually check the PCB for damage and burnt‑out components. If any damage found, replace the PCB, see "4.8.2 Repair procedures" [ 120]. 4 Turn ON the power of the unit. 5 Measure the voltage between the pins 1‑3 of the connector X27A on the indoor unit main PCB.
Page 114 Components A EKVDX-A a Connector X27A Is the measured voltage on the indoor Action unit main PCB correct? Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure. Continue with the next step. 6 Check the power supply to the indoor unit, see "5.1.1 ...
Page 115 Components A EKVDX-A a HAP LED INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool. Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure.
Page 116 Components Indoor unit size Capacity setting adapter EKVDX50A2VEB EKVDX80A2VEB EKVDX100A2VEB J112 Indoor unit Capacity setting adapter VAM350J8VEB VAM500J8VEB VAM650J8VEB VAM800J8VEB VAM1000J8VEB 1000 VAM1500J8VEB 1500 VAM2000J8VEB 2000 Is the correct spare part for the indoor Action unit main PCB installed? Return to "4.8.1 Checking...
Page 117 Components 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. A VAM-J8 a Fuse F1U A EKVDX-A a Fuse F1U Blown fuse on the indoor unit main Action PCB? Replace the blown fuse, see "4.8.2 Repair procedures" [ 120].
Page 118 Components A VAM-J8 a Varistors A EKVDX-A a Varistors Any broken varistors on the indoor unit Action main PCB? Replace the indoor unit main PCB, see "4.8.2 Repair procedures" [ 120]. Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure.
Page 119 Components C– C– A VAM-J8 C+ C+ terminal C- C- terminal A EKVDX-A a C+ and C- terminal Is the rectifier voltage on the indoor Action unit main PCB correct? Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure.
Page 120 Components A EKVDX-A a V DC out (C+) b V AC in (X27A - pin 1) c V AC in (X27A - pin 3) d V DC out (C-) INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter.
Page 121 Components To remove the indoor unit main PCB VAM-J8 units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.10 Plate work" [ 134]. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 122 Components a Wire terminal X1M b Wire terminal X2M c Jumper X29A d Ground wire e PCB support 4 Remove the jumper from the connector X29A of the indoor unit main PCB. Keep for reuse. 5 Disconnect all other connectors from the indoor unit main PCB. 6 Remove the screw and disconnect the PCB ground wire from the switch box.
Page 123 Components a Indoor unit main PCB b Ground wire c PCB holder 14 Remove the indoor unit main PCB from the indoor unit. 15 To install the indoor unit main PCB, see "4.8.2 Repair procedures" [ 120]. To install the indoor unit main PCB VAM-J8 units 1 Install the indoor unit main PCB in the correct location in the switch box.
Page 124 6 Connect the wiring to the wire terminals X1M and X2M. Tighten the screws to fix the wiring. 7 Check that the correct capacity setting adapter is installed on connector X23A of the spare part indoor unit main PCB. Indoor unit Capacity setting adapter VAM350J8VEB VAM500J8VEB VAM650J8VEB VAM800J8VEB VAM1000J8VEB 1000...
Page 125 Components EKVDX-A units INFORMATION When replacing the indoor unit main PCB, R32 leak detection sensor PCB ALSO MUST be replaced. See "4.11.2 Repair procedures" [ 147] and replace R32 leak detection sensor. 9 Install the indoor unit main PCB in the correct location. Firmly latch the PCB holders to fix the PCB.
Page 126 Components Is the problem solved? Action Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure. To remove a fuse of the indoor unit main PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 127 Components A VAM-J8 a Fuse F1U A EKVDX-A a Fuse F1U Is the problem solved? Action No further actions required. Return to "4.8.1 Checking procedures" [ 112] of the indoor unit main PCB and continue with the next procedure. 4.9 Limit switch 4.9.1 Checking procedures To perform an electrical check of the limit switch Prerequisite: Stop the unit operation via the user interface.
Page 128 Components 3 Measure the voltage between the pins of connector X5A (for limit switch S1C) or X6A (for limit switch S2C) on the indoor unit main PCB. Result: The measured voltage MUST be 16 V DC. Is the measured voltage correct? Action Continue with the next step.
Page 129 Components a Screw b Side rail (supply air fan) 2 Remove the side rail from the unit. 3 Remove the 2 screws from the damper assembly. a Screw b Damper assy 4 Carefully pull back the damper assembly. 5 Disconnect the wiring (Faston connectors) from the limit switch. a Faston connector b Screw 6 Remove the 2 screws from the limit switch.
Page 130 Components To install the limit switch 1 Install the limit switch on the correct location on the damper assembly. 2 Install and tighten the 2 screws to fix the limit switch. a Faston connector b Screw 3 Connect the wiring (Faston connectors) to the limit switch. 4 Install the damper assembly in the correct location on the unit.
Page 131 Components a Screw b Side rail (supply air fan) Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the limit switch wiring harness Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 132 Components a Limit switch b Faston connector 6 Disconnect the limit switch connector from the indoor unit main PCB. 7 Route the limit switch wiring harness out of the switch box and out of the appropriate retainers. 8 Cut all tie straps (if applicable) that fix the wiring harness. 9 Remove the limit switch wiring harness from the unit.
Page 133 Components a Screw b Damper assy 4 Install the side rail (supply air fan) in the correct location on the unit. 5 Install and tighten the screw to fix the side rail. a Screw b Side rail (supply air fan) 6 Route the limit switch wiring harness through the appropriate retainers inside the switch box.
Page 134 Components 4.10 Plate work 4.10.1 DX units To remove the switch box cover Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 135 Components ▪ Bottom plate A: provides access to the discharge air chamber ▪ Bottom plate B: provides access to the drain pump, float switch, and refrigerant components X EKVDX32A2VEB A Bottom plate A B Bottom plate B X EKVDX100A2VEB A Bottom plate A B Bottom plate B ▪...
Page 136 Components X EKVDX32A2VEB A Bottom plate A X EKVDX100A2VEB A Bottom plate A ▪ TO REMOVE BOTTOM PLATE B Prerequisite: First remove bottom plate A. 1 Remove the screws and remove the middle plate. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 –...
Page 137 Components X EKVDX32A2VEB a Middle plate X EKVDX100A2VEB a Middle plate 2 Remove the screws from the bottom plate B. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 138 Components X EKVDX32A2VEB B Bottom plate B X EKVDX100A2VEB B Bottom plate B 3 Slide the bottom plate B in the direction of the discharge air outlet and remove the plate. 4 To install the bottom plates, see "4.10 Plate work" [ 134].
Page 139 Components A EKVDX32A2VEB a Drain pan A EKVDX100A2VEB a Drain pan 3 To install the drain pan, see "4.10 Plate work" [ 134]. To install the drain pan 1 Install the drain pan in the correct location on the indoor unit. 2 Slightly push the drain pan upwards to correctly fix it. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner...
Page 140 Components A EKVDX32A2VEB a Drain pan A EKVDX100A2VEB a Drain pan 3 Install the bottom plates, see "4.10 Plate work" [ 134]. To install the bottom plates ▪ TO INSTALL BOTTOM PLATE B 1 Slide the bottom plate B in the correct location on the indoor unit. 2 Install and tighten the screws to fix the bottom plate B.
Page 141 Components X EKVDX32A2VEB B Bottom plate B X EKVDX100A2VEB B Bottom plate B 3 Install the middle plate in the correct location. 4 Install and tighten the screws to fix the middle plate. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 –...
Page 142 Components X EKVDX32A2VEB a Middle plate X EKVDX100A2VEB a Middle plate ▪ TO INSTALL BOTTOM PLATE A Prerequisite: First install bottom plate B. 1 Install the bottom plate A in the correct location on the indoor unit. 2 Install and tighten the screws to fix the bottom plate A. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner...
Page 143 Components X EKVDX32A2VEB A Bottom plate A X EKVDX100A2VEB A Bottom plate A 4.10.2 Heat reclaim ventilation unit To remove the switch box cover Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 144 Components a Screw b Switch box cover 3 Remove the switch box cover from the unit. 4 To install the switch box cover, see "4.10 Plate work" [ 134]. To install the switch box cover 1 Install the switch box cover in the correct location on the unit. 2 Install and tighten the 3 screws to fix the switch box cover.
Page 145 Components a Screw b Hinge mechanism c Maintenance cover d Hanging metal 3 Turn the hinge mechanism to the left. 4 Rotate the maintenance cover around the vertical axis of the hanging metal and remove the maintenance cover. 5 To install the maintenance cover, see "4.10 Plate work" [ 134].
Page 146 Components a Screw b Hinge mechanism c Maintenance cover d Hanging metal 2 Rotate the maintenance cover around the vertical axis of the hanging metal and put it in the correct location. 3 Turn the hinge mechanism to the right. 4 Tighten the screw to fix the hinge mechanism to the maintenance cover.
Page 147 Components Measured values are correct? Action Replace the R32 leak detection sensor, "4.11.2 Repair procedures" [ 147]. 4 Connect the R32 leak detection sensor connector to the indoor unit main PCB. 5 Turn ON the power using the respective circuit breaker. 6 Start the unit operation via the user interface. 7 Activate Cooling operation via the user interface.
Page 148 Components 3 Route the disconnected wiring harnesses out of the switch box and route them away (through any holes if applicable) until they are completely free. 4 Cut all tie straps that fix the wiring harnesses. 5 Remove insulation from the wiring harnesses if needed. 6 Remove the drain outlet pipe from the drain pump.
Page 149 Components a Screw b R32 leak detection sensor 3 Install the drain pump assembly in the correct location on the indoor unit. 4 Install and tighten the 5 screws on the drain pump assembly mounting plate. a Drain outlet pipe b Drain pump assy c Screw (drain pump assy) 5 Install the drain outlet pipe on the drain pump.
Page 150 Components INFORMATION Upon power supply to the indoor unit, set the field setting 25-14 = 02 to reset the timer of the R32 leak detection sensor. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 151 Components 4.12.2 Repair procedures To remove the reactor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.10 Plate work" [ 134]. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 152 Components 4.13 Remote controller user interface 4.13.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To check the correct functioning of the remote controller user interface 1 Check the display for the following items: ▪...
Page 153 Components Is the setting correct? Action Return to the troubleshooting of the specific error and continue with the next procedure. Adjust the specific setting see "4.13.2 Repair procedures" [ 154]. To check the software and EEPROM version 1 Compare the software ID and EEPROM version of the remote controller user interface and the PCB with the ones provided in the Updater Tool.
Page 154 Components 4.13.2 Repair procedures To remove the user interface 1 See relevant manual of the user interface (remote controller) for the correct procedure. 2 To install the user interface, see "4.13.2 Repair procedures" [ 154]. To install the user interface 1 See relevant manual of the user interface (remote controller) for the correct procedure.
Page 155 Components 1 Locate the thermistor and remove the insulation if needed. Check that the thermistor is correctly installed and that there is thermal contact between the thermistor and the piping or ambient (for air thermistor). Is the thermistor correctly installed Action (thermal contact between the thermistor and the piping)?
Page 156 Components Thermistor – Table A T °C kΩ T °C kΩ T °C kΩ T °C kΩ –30 361.8 51.0 10.6 –25 265.5 39.1 –20 196.6 31.5 –15 147.6 25.0 –10 111.7 20.0 –5 85.3 16.1 65.7 13.0 Thermistor – Table B T °C kΩ...
Page 157 Components INFORMATION All thermistors have a resistance tolerance of 3%. INFORMATION Connect the service monitoring tool to the unit or use field settings mode 1 (see service manual of the outdoor unit) to monitor the thermistors. If the measured resistance value matches the resistance determined through the measured temperature, but the temperature for the corresponding thermistor via service monitoring tool or field settings mode 1 is NOT correct, replace the applicable PCB.
Page 158 Components A EKVDX-A unit a Tie strap b Discharge air thermistor c Suction air thermistor mounting plate 2 Cut all tie straps that fix the thermistor harness and route the harness out of the retainers (if applicable). 3 Disconnect the thermistor connector from the indoor unit main PCB and remove the thermistor.
Page 159 Components A VAM-J8 unit a Indoor air thermistor b Outdoor air thermistor A EKVDX-A unit a Tie strap b Discharge air thermistor c Suction air thermistor mounting plate 2 Fix the air thermistor using new tie strap(s). 3 Route the thermistor harness through the appropriate retainers (if applicable) towards the indoor unit main PCB.
Page 160 Components 3 Connect the thermistor connector to the indoor unit main PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 161 Components Does the remote controller user Action interface function correctly? Return to the troubleshooting of the specific error and continue with the next procedure. Continue with the next step. 4 Perform a check of the communication wiring between the remote controller and the unit PCB.
Page 162 Components INFORMATION Correct the wiring as needed. VAM-J8 units 4 Make sure that all wires between the remote controller user interface P1/P2 and the wire terminal X1M: P1/P2 on the indoor unit PCB are firmly and correctly connected, see "7.2 Wiring diagram" [ 177].
Page 163 Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 164 Third party components 5 Third party components 5.1 Electrical circuit 5.1.1 Checking procedures To check the power supply to the indoor unit EKVDX-A units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.10 Plate work" [...
Page 165 Third party components Is the measured voltage (power supply) Action correct? Return to the troubleshooting of the specific error and continue with the next procedure. Adjust the power supply, see "5.1.2 Repair procedures" [ 167]. To check if the power supply is compliant with the regulations 1 Check that the power source is in line with the requirements described in the databook.
Page 166 Third party components F1-F2 terminals on indoor units, outdoor units and central controllers are all possible measurement points. Use as many points as you can and take the time necessary for measurement if analyzing with an oscilloscope. On outdoor units, measurement should be done either at F1-F2 IN or F1-F2 OUT. If the F1-F2 OUT terminal is not used, then measure at the F1-F2 IN terminal.
Page 167 Third party components Ringing. Possible reasons: ▪ Transmission wiring very close to high voltage cables, ▪ Use of multi-conductor type wires. Noise. Possible reasons: ▪ Transmission wiring very close to high voltage cables, ▪ Transmission wiring effected from external equipment causing noise. Faulty Waveform.
Page 168 Third party components 2 Adjust the power supply within 50 Hz ± 3%. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To perform a communication reset NOTICE If an indoor unit is powered OFF when communication reset is performed, the outdoor unit will delete this indoor unit information since this unit will not be...
Page 169 Third party components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 5.2 Refrigerant circuit 5.2.1 Checking procedures INFORMATION Depending on the combination between the indoor unit and outdoor unit, these procedures may differ.
Page 170 Third party components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 5.4 External factors 5.4.1 Checking procedures To check for objects that may block the airflow 1 Check for the presence of object(s) near the indoor unit that may block the airflow.
Page 171 General maintenance/inspection checklist. Next to the maintenance instructions in this chapter, a general maintenance/inspection checklist is also available on the Daikin Business Portal (authentication required). The general maintenance/inspection checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during maintenance.
Page 172 Maintenance 6.1.2 Checklist for maintenance of the heat reclaim ventilation unit Check the air filters at least once a year. The air filters can get blocked due to dust, dirt, leaves, etc. It is recommended to clean the air filters yearly. A blocked air filter can cause an excessive pressure drop and reduced performance.
Page 173 Maintenance a Heat exchange element b Handle c Rail d Air filter A Models 350~1000 B Models 1500+2000 3 To clean the air filter, lightly pat it with your hand or remove dust with a vacuum cleaner. If excessively dirty, wash it in water. 4 If the air filter is washed, remove water completely and allow to dry for 20 to 30 minutes in the shade.
Page 174 Maintenance 6.1.4 Maintenance of the heat exchange element NOTICE ▪ NEVER wash the heat exchange element with water. ▪ NEVER touch the heat exchange element paper because it can be damaged if it is forced. ▪ Do NOT crush the heat exchange element. To clean the heat exchange element 1 Take out the heat exchange elements.
Page 175 Maintenance ▪ Heat exchanger ▪ Drain pan Instructions The heat exchanger and drain pan of the indoor unit can get contaminated and blocked up. It is recommended to clean the heat exchanger and drain pan yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance.
Page 176 Technical data 7 Technical data 7.1 Detailed information setting mode 7.1.1 Detailed information setting mode: Indoor unit See the installer reference guide on business portal for more information. 7.1.2 Detailed information setting mode: Remote controller See the installer reference guide on business portal for more information. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner...
Page 177 Technical data 7.2 Wiring diagram 7.2.1 Wiring diagram: VAM-J8 The wiring diagram can be found on the outside of the service cover. Legend for wiring diagrams: Printed circuit board Printed circuit board assy (fan) (VAM350~650) A2P-A3P Printed circuit board assy (fan) (VAM800+1000) A2P~A5P Printed circuit board assy (fan) (VAM1500+2000)
Page 178 Technical data Remote controller Selector switch Connector for option X14A Connector (CO sensor) X24A Connector (outside damper) X33A Connector (contact printed circuit board) X35A Connector (power supply printed circuit board) Symbols: Field wiring Terminals Connectors Protective earth Noiseless earth Colours: Black Blue Brown...
Page 179 Technical data English Translation Caution for ELECTRIC SHOCK Caution for ELECTRIC SHOCK Do not open the el. compo. box cover Do not open the electrical component for 10 minutes after the power supply is box cover for 10 minutes after the turned off.
Page 180 Technical data Wiring diagram VAM800+1000J8 INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 220-240V/220V Q1DI X33A 50/60Hz X14A...
Page 181 Technical data Wiring diagram VAM1500+2000J8 INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 220-240V/220V t ゜ t ゜...
Page 182 Technical data 7.2.2 Wiring diagram: EKVDX See the internal wiring diagram supplied with the unit (on the inside of the indoor unit switch box cover). The abbreviations used are listed below. Unified legend For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by "*"...
Page 183 Technical data Symbol Meaning Heater FU*, F*U, (for characteristics, refer Fuse to PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L Pilot lamp, light emitting diode Light emitting diode (service monitor green) HIGH VOLTAGE High voltage Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M...
Page 184 Technical data Symbol Meaning Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver Selector switch SHEET METAL...
Page 185 Technical data English Translation Gas sensor circuit Gas sensor circuit Wired remote controller Wired remote controller Control box layout Control box layout Wiring diagram INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book.
Page 186 Technical data 7.3 Piping diagram 7.3.1 Piping diagram: Indoor unit EKVDX INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book.
Page 187 Technical data 7.4 Component overview 7.4.1 Component overview: DX unit a Supply air i Gas pipe b Discharge air j Liquid pipe c Heat exchanger k Gas thermistor R3T d Electronic expansion valve Y1E l Drain plug e Switch box m Air thermistor R1T (mounting plate) f Drain pump M1P n Refrigerant liquid thermistor R2T...
Page 188 Technical data 7.4.2 Component overview: Heat reclaim ventilation unit VAM350~650J8 a Air inlet h Switch box b Exhaust air fan M2F i Air filter c Exhaust air j Crossflow paper heat exchanger d Bypass damper k Damper motor M1D e Air return l Limit switch S1C f Supply air fan M1F m Indoor air thermistor R1T...
Page 189 Technical data VAM800+1000J8 a Air inlet h Switch box b Exhaust air fan M1F i Air filter c Exhaust air j Crossflow paper heat exchanger d Bypass damper k Damper motor M1D e Air return l Limit switch S1C f Supply air fan M2F m Indoor air thermistor R1T g Air supply n Outdoor air thermistor R2T...
Page 190 Technical data VAM1500+2000J8 a Air inlet (top) m Air inlet (bottom) b Exhaust air fan (top) M3F n Exhaust air (bottom) c Exhaust air (top) o Damper motor (bottom) M1D d Bypass damper (top) p Limit switch (bottom) S1C e Air return (top) q Bypass damper (bottom) f Air return (bottom) r Damper motor (top) M2D...
Page 191 Technical data 7.5 Switchbox overview EKVDX-A a Main PCB A1P b R32 leak sensor PCB A3P c Transmission wiring terminal X1M d Power supply wiring terminal X2M e External output PCB A2P VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 –...
Page 192 Technical data VAM-J8 A VAM350~650J8 B VAM800+1000J8 C VAM1500+2000J8 a Fan PCB A2P a Main PCB A1P a Main PCB A1P b Reactor L1R b Reactor L2R b Fan PCB A2P c Main PCB A1P c Fan PCB A3P c Fan PCB A4P d Power supply wiring d Fan PCB A2P d Reactor L3R...
Page 193 Technical data 7.6 Field information report See next page. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 194 In case a problem occurred on the unit which could not be resolved by using the content of this service manual or in case you have a problem which could be resolved but of which the manufacturer should be notified, we advise you to contact your distributor.
Page 195 Application information Application (house, apartment, office,…): New project or reimbursement: Piping layout / Wiring layout (simple schematic): Unit / Installation information Model name: Serial number: Installation / commissioning date: Software version user interface: Software version outdoor PCB: Provide pictures of the field settings overview (viewable on the user interface).
Page 196 Technical data 7.7 Service tools 1 For an overview of the available service tools, check the Daikin Business Portal (authentication required). 2 Go to the tab After-sales support on the left navigation pane and select Technical support. 3 Click the button Service tools. An overview of the available service tools for the different products is shown.
Page 197 Images are in English and for reference ONLY. For more details on the Madoka Assistant please refer to the BRC1H training course material which is available on the Daikin Business Portal. To set as installer mode In order to retrieve the field settings, the Madoka Assistant app has to be set as installer mode.
Page 198 Technical data Action Image Result Tap Application version Installer mode screen is 5 times. displayed. Select (tap) the length The Madoka Assistant of time the Madoka app is set as installer Assistant app is set as mode. installer mode: ▪ Temporary 30 minutes ▪...
Page 199 Technical data Action Image Result Tap Field settings. The Field settings screen is displayed. Tap and select the type Field settings can now for which you want to be set for the selected set the field settings: type. ▪ Indoor unit ▪...
Page 200 Technical data Action Image Result In the case of setting ▪ case per indoor unit during individual setting per group control (When indoor unit, current Mode No. such as 20, settings 21, 22, 23, 25 are displayed. selected), tap and ▪...
Page 201 Technical data Action Image Result Tap Apply to remote Changes are applied to controller. the field settings. Tap Apply. Changes to the field settings are confirmed. Tap Return to field Field settings are saved. settings. VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 –...
Page 202 Technical data Service manual VAM350~2000J8VEB + EKVDX32~100A2VEB VRV system air conditioner ESIE22-07 – 2022.10...
Page 203 Technical data VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 204 Technical data Service manual VAM350~2000J8VEB + EKVDX32~100A2VEB VRV system air conditioner ESIE22-07 – 2022.10...
Page 205 Technical data VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 206 Technical data Settings for all configurations Setting 17(27)-4: First choose the fan speed. Set it to high or ultra-high. Flow "All other system configurations" is not applicable when combining VAM with EKVDX. Check the field settings for both units to make sure the combination of VAM and EKVDX is operational Direct duct connection All other system configurations or external fan...
Page 207 Technical data About setting 19(29)-0-04 and 19(29)-0-05 ▪ When you have configured setting 19(29)‑0‑04 successfully, the system automatically changes it to setting 19(29)‑0‑01. ▪ When you have configured setting 19(29)‑0‑05 successfully, the system automatically changes it to setting 19(29)‑0‑02. NOTICE If the ducting is changed, install clean filters and reconfigure setting 19(29)‑0‑04 or 19(29)‑0‑05.
Page 208 Technical data e Maximum length of connection line: 500 m VAM VAM heat reclaim ventilation unit NOTICE Factory settings: Do NOT change the switch settings when a controller is connected. SS1 is a setting switch to operate the unit without controller. Changing the switch setting when a controller is connected will stop the unit from operating normally.
Page 209 Technical data P1 P2 P1P2 P1 P2 a Controller for air conditioner b Controller for air conditioner c Maximum length of connection line: 500 m VRV VRV indoor unit VAM VAM heat reclaim ventilation unit Linked control with more than 2 groups NOTICE Group control connection is NOT allowed with EKVDX indoor units.
Page 210 Technical data Activate setting 17-8-02 to set the central zone link to ON. No further settings are required. Direct duct connection NOTICE Direct duct connection is NOT allowed with EKVDX indoor units. The line connections are the same as for the 1-group linked-control system. P1 P2 P1 P2 P1P2...
Page 211 Technical data EKVDX F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 EKVDX F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 P1 P2 P1 P2 a Outdoor unit b Controller c Central controller for all units VRV VRV indoor unit EKVDX EKVDX indoor unit VAM VAM heat reclaim ventilation unit...
Page 212 Technical data ▪ Up to 64 units, a combination of air conditioners and VAM units, can be connected to the F1 and F2 terminals. ▪ This system does NOT require group number setting for central control (auto- address system). The central control group number is automatically assigned if the adapter PCB (KRP2A51) or schedule timer (DST301B51) is connected.
Page 213 Technical data Example Setting the central control group number 2-05 to 1: Use the local setting on the controller to set the central control group number. Mode number: 00 Central control group number: 2-05 Zone control F1 F2 VAM 1 F1 F2 VAM 2 F1 F2...
Page 214 Technical data ▪ For the ventilation air flow setting, follow the procedure described in "All control" [ 211]. ▪ For zone setting using the central controller, see the operation manual of the central controller. ▪ The central controller can be used to control individual units in the zone for ventilation.
Page 215 Technical data Mode Description position 17(27) L/H‑tap UH‑tap VAM350~2000J8VEB + EKVDX32~100A2VEB Service manual VRV system air conditioner ESIE22-07 – 2022.10...
Page 216 ESIE22-07 2022.10 Verantwortung für Energie und Umwelt...

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