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Summary of Contents for Voltronic Power Axpert MEX-1500
- Page 1 Axpert MEX-1500/ MEX-3000 Service manual Axpert Charger/ Inverter Service manual...
- Page 2 Axpert MEX-1500/ MEX-3000 Service manual Prepared Approved Revision Description Rondo Initial draft release 2016-3-25...
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Page 3: Table Of Contents
Axpert MEX-1500/ MEX-3000 Service manual Table of contents General information ............................4 Getting start ............................4 Important safety instructions ....................... 4 Functional block ..............................6 Working principle of the major functional block .................... 7 Switch Power Supply ..........................7 DC TO DC converter (full bridge) ....................... 8 DC TO AC inverter (full-bridge) ...................... -
Page 4: General Information
Axpert MEX-1500/ MEX-3000 Service manual 1. General information 1.1 Getting start This manual is for Axpert MEX 1.5KVA 3KVA series, it can help service personal perform the basic maintenance and repair service. This manual focus on the service, so you should get the basic operation of the Inverter/Charger from the user manual, and make sure you had read and understood user manual before you use this service manual. - Page 5 Axpert MEX-1500/ MEX-3000 Service manual drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion. 9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to INSTALLATION section of this manual for the details.
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Page 6: Functional Block
Axpert MEX-1500/ MEX-3000 Service manual 2. Functional block Axpert MEX 1.5KVA 3KVA series production employ a double conversion topology, comprise following functional blocks, as shown in figure 2.1 PV + PWM SCC (EX) PV - MPPT SCC (MEX) Input Breaker... -
Page 7: Working Principle Of The Major Functional Block
Axpert MEX-1500/ MEX-3000 Service manual 3. Working principle of the major functional block 3.1 Switch Power Supply The switch power supply (SPS) supplies DC power for Inverter/Charger operation. The input voltage of the SPS is the battery. Figure 3.1 basic circuit of power supply This is the fly-back DC-DC converter, fly-back operation can be easily recognized from the position of the dots on the transformer primary and secondary (these dots show starts of the winds). -
Page 8: Dc To Dc Converter (Full Bridge)
Axpert MEX-1500/ MEX-3000 Service manual 3.2 DC TO DC converter (full bridge) The full bridge topology is a transformer isolated forward-mode regulator. Unlike the fly-back transformer, the push-pull transformer does not store any energy and output current is drawn when power switches are conducting. -
Page 9: Dc To Ac Inverter (Full-Bridge)
Axpert MEX-1500/ MEX-3000 Service manual 3.3 DC TO AC inverter (full-bridge) The Inverter circuit (Figure 3.3) of Axpert MEX series is based on a full-bridge circuitry and its output is driven by photo-couplers. The photo-couplers are capable to drive high energy and high speed power of MOSFET and IGBT with independent high and low referenced output channels. -
Page 10: Charger
Axpert MEX-1500/ MEX-3000 Service manual 3.4 Charger The Charger of utility is to recharge and maintain the batteries at fully charged condition .The charger charges the batteries with a constant current at initial stage, and as battery voltage keep increasing, the charge current decrease accordingly until the charge voltage reached the constant voltage level, and then the charger turn to the floating charge mode. -
Page 11: Functional Explanations For Each Pcb
Axpert MEX-1500/ MEX-3000 Service manual 4. Functional explanations for each PCB Item Series name PCB name PCB serial number Quantity Remark Main 71-500540-XXG CNTL 71-500500-XXG MEX-1500-12 71-500565-XXG COMM 71-500567-XXG 71-500238-XXG Main 71-500541-XXG CNTL 71-500500-XXG MEX-1500-24 71-500565-XXG COMM 71-500567-XXG 71-500238-XXG Main... -
Page 12: Comm Board
Axpert MEX-1500/ MEX-3000 Service manual 4.4 COMM board This inverter/charger is equipped with a communication port to communicate with a PC with corresponding software. Please use supplied communication cable to connect to communication port of this inverter and USB port of the PC. -
Page 13: Interface
Axpert MEX-1500/ MEX-3000 Service manual 5. Interface The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information. -
Page 14: Lcd Display Icons
Axpert MEX-1500/ MEX-3000 Service manual 5.2 LCD Display Icons Icon Function description Input Source Information Indicates the AC input. Indicates the PV input Indicate input voltage, input frequency, PV voltage, battery voltage and charger current. Configuration Program and Fault Information Indicates the setting programs. - Page 15 Axpert MEX-1500/ MEX-3000 Service manual Indicates the battery type, AGM, Flooded or User-defined battery. Battery level icon will present battery when unit is charging. Status Battery voltage LCD Display <2V/cell 4 bars will flash in turns. Bottom bar will be on and the other three Constant 2 ~ 2.083V/cell...
- Page 16 Axpert MEX-1500/ MEX-3000 Service manual Indicates unit connects to the PV panel. Indicates load is supplied by utility power. Indicates the utility charger circuit is working. Indicate the solar charger circuit is working. Indicates the DC/AC inverter circuit is working.
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Page 17: Troubleshooting
Axpert MEX-1500/ MEX-3000 Service manual 6. Troubleshooting This section describes how to find the trouble when the system is abnormal. We suggest you can follow the service procedure: Check the system status by LED and LCD display, the sounds of buzzer. -
Page 18: Warning Indicator
Axpert MEX-1500/ MEX-3000 Service manual 6.2 Warning Indicator Warning Warning Event Audible Alarm Icon flashing Code Beep three times every Fan is locked second Beep once every Battery is over charged 1second Beep once every 1 Low battery second Beep once every 0.5... -
Page 19: Quick Start
Axpert MEX-1500/ MEX-3000 Service manual When the unit is turned on, internal LCD display and Check if battery wires are relay is switched Battery is disconnected. LEDs are flashing. connected well. on and off repeatedly. Overload error. The inverter is Reduce the connected load Fault code 07. - Page 20 Axpert MEX-1500/ MEX-3000 Service manual Functional Checked components Instruction function Reference value Failed status block Fuse F1,F2,F3 Resistance 0.15 ohm short or open Q11,Q17,Q20,Q24 218k DS short or open MOSFET(IRFB3206 Q38,Q21,Q22,Q63 230k GD short or open Resistance or IRLB8314) Q13,Q18,Q23,Q35 Q40,Q26,Q25,Q39 11.7k GS...
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Page 21: Test Step
Axpert MEX-1500/ MEX-3000 Service manual 7. Test Step... -
Page 22: Electrical Specification
Axpert MEX-1500/ MEX-3000 Service manual 8. Electrical specification Table 1 Line Mode Specifications Line Mode (Utility Bypass Mode) Axpert Model MEX-1500-12 MEX-1500-24 MEX-3000-24 Input Voltage Waveform Sinusoidal (utility or generator) Nominal Input Voltage 230Vac Low Loss Voltage 170Vac±7V(UPS); 90Vac±7V(Appliances) Low Loss Return Voltage 180Vac±7V(UPS);... - Page 23 Axpert MEX-1500/ MEX-3000 Service manual Table 2 Invert Mode Specifications Inverter Mode Axpert Model MEX-1500-12 MEX-1500-24 MEX-3000-24 Rated Output Power 1500VA/1200W 3000VA/2400W Output Voltage Waveform Pure Sine Wave Output Voltage Regulation 230Vac±5% Output Frequency 50Hz Peak Efficiency 5s@≥150% load; 10s@110%~150% load...
- Page 24 Axpert MEX-1500/ MEX-3000 Service manual Table 3 Charge Mode Specifications Utility Charging Mode Axpert Model MEX-1500-12 MEX-1500-24 MEX-3000-24 Charging Current 60Amp (170Vac~280Vac) Charging Floating Voltage 13.5Vdc 27Vdc Charging Algorithm 3-Step . Charging current = 30Amp ~ 60Amp (@ 90Vac~170Vac) Solar Charging Mode (MPPT)
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