Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Voltronic Power 1KVA
Summary of Contents for Voltronic Power 1KVA
- Page 1 Axpert MKS 1~3KVA 24V Service manual Axpert Charger/ Inverter Service manual...
- Page 2 Axpert MKS 1~3KVA 24V Service manual Prepared Approved Revision Description Jing Fang Francis Fu Initial draft release 2013-06-10 2013-06-11...
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Page 3: Table Of Contents
Axpert MKS 1~3KVA 24V 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 (push-pull)...................... -
Page 4: General Information
1. General information 1.1 Getting start This manual is for Axpert MKS 1KVA-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 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. 10. Fuses (40A, 32VDC *4pcs for 1KVA/2KVA and *6pcs for 3KVA) are provided as over-current protection for the battery supply.
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Page 6: Functional Block
Axpert MKS 1~3KVA 24V Service manual 2. Functional block Axpert MKS 1KVA-3KVA series production employ a double conversion topology, comprise following functional blocks, as shown in figure 2.1 Figure 2.1 function block diagram... -
Page 7: Working Principle Of The Major Functional Block
Axpert MKS 1~3KVA 24V 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 or AC Charger output voltage. 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 (Push-Pull)
Axpert MKS 1~3KVA 24V Service manual 3.2 DC TO DC converter (push-pull) The push-pull 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 either power switches (Q7-Q11 or Q2-Q6) is conducting. A push-pull topology is shown in figure 3.2, power switch Q7-Q11 and Q2-Q6 receive 180 out-of-phases. -
Page 9: Dc To Ac Inverter (Full-Bridge)
Axpert MKS 1~3KVA 24V Service manual 3.3 DC TO AC inverter (full-bridge) The Inverter circuit (Figure 3.3) and PWM control are only active under battery mode. The Inverter circuit of Axpert MKS 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 MKS 1~3KVA 24V 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 MKS 1~3KVA 24V Service manual 4. Functional explanations for each PCB Item Series name PCB name PCB serial number Quantity Remark Main 71-500324-XXG MPPT 71-600084-XXG MKS-1000-24 COMM 71-500237-XXG 71-500238-XXG MPPT COMM 71-500323-XXG MKS-2000-24 Main 71-500349-XXG Item 2~5 is common MKS-2000-24 Main 71-500348-XXG... -
Page 12: Led Board
Axpert MKS 1~3KVA 24V Service manual 4.4 LED board The LED display panel includes there indicators and four functional keys. 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 13: Lcd Display Icons
Axpert MKS 1~3KVA 24V Service manual Function Keys Function Key Description Exit setting mode To previous selection DOWN To next selection ENTER To confirm the selection in setting mode or enter setting mode 5.2 LCD Display Icons Icon Function description Input Source Information Indicates the AC input. - Page 14 Axpert MKS 1~3KVA 24V Service manual Battery Information Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode. In AC mode, it will present battery charging status. Status Battery voltage LCD Display <2V/cell 4 bars will flash in turns.
- Page 15 Axpert MKS 1~3KVA 24V Service manual Load Information Indicates overload. Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%. 0%~25% 25%~50% 50%~75% 75%~100% Mode Operation Information Indicates unit connects to the mains. Indicates unit connects to the PV panel. Indicates load is supplied by utility power.
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Page 16: Troubleshooting
Axpert MKS 1~3KVA 24V 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. Observe the failure board, static checking. -
Page 17: Warning Indicator
Axpert MKS 1~3KVA 24V Service manual 6.2 Warning Indicator Warning Warning Event Audible Alarm Icon flashing Code Beep three times every Fan is locked second Battery is over charged Beep once every 1second Beep once every 1 Low battery second Beep once every 0.5 Overload second... -
Page 18: Quick Start
Axpert MKS 1~3KVA 24V Service manual check if input voltage range setting is correct (UPSAppliance) Green LED is Set Solar power as the priority of Change output source flashing. output source priority to Utility first. When the unit is turned on, internal LCD display and Check if battery wires are relay is switched... - Page 19 Axpert MKS 1~3KVA 24V Service manual Functional Instruction Checked components Reference value Failed status block function Fuse F1---F6 Resistance 0.14 ohm short or open 310k DS short or open MOSFET(IRF1407/IRF3205) Q2---Q11 Resistance 290k GD short or open short or open DC-DC Converter Diode(RHRP1560/RHRP860)
- Page 20 Axpert MKS 1~3KVA 24V Service manual 430ohm short or open MOSFET Q5,Q6 Resistance >1M short or open 0.618K short or open 448ohm short or open MOSFET Q27,Q37,Q29,Q39 Resistance >1M short or open 100K short or open...
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Page 21: Test Step
Axpert MKS 1~3KVA 24V Service manual 7. Test Step... -
Page 22: Electrical Specification
Axpert MKS 1~3KVA 24V Service manual 8. Electrical specification Table 1 Line Mode Specifications INVERTER MODEL 1KVA 2KVA 3KVA Sinusoidal (utility or generator) Input Voltage Waveform 230Vac Nominal Input Voltage 170Vac±7V (UPS); Low Loss Voltage 90Vac±7V (Appliances) 180Vac±7V (UPS); Low Loss Return Voltage 100Vac±7V (Appliances) - Page 23 Axpert MKS 1~3KVA 24V Service manual Table 2 Invert Mode Specifications INVERTER MODEL 1KVA 2KVA 3KVA 1KVA/0.8KW 2KVA/1.6KW 3KVA/2.4KW Rated Output Power Pure Sine Wave Output Voltage Waveform 230Vac±5% Output Voltage Regulation 50Hz Output Frequency Peak Efficiency 5s@≥150% load; 10s@110%~150% load...
- Page 24 Axpert MKS 1~3KVA 24V Service manual Table 3 Charge Mode Specifications INVERTER MODEL 1KVA 2KVA 3KVA Charging Algorithm 3-Step Utility Charging Mode Charging Current (UPS) 20/30Amp (@V =230Vac) Charging Floating Voltage 27Vdc Solar Charging Mode Solar charger type MPPT Rated power...
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