Why to restart the Must PH1800 PLUS 4K Inverter?
To determine if restarting the inverter resolves the issue, check if the fault repeats after the restart. If it does, it may be necessary to replace the control boards.
What to do if there is no LCD display when the Must PH1800 PLUS 4K Inverter turns on?
If the LCD display doesn't turn on when you switch on your Must Inverter, first check the battery voltage to ensure it's within the range of 44V-52V. If it is, try switching the inverter on again to see if it starts. If it still doesn't run, disconnect all connections, open the surface panel, and remove the main board for further inspection and repair.
What to do if the Must Inverter doesn't work after restarting by only connecting to the battery?
To troubleshoot the Must Inverter, start by restarting it with only the battery connected. If the fault continues, check the main board.
What to do if the Must PH1800 PLUS 4K doesn't work after restarting and connecting to the battery?
To troubleshoot the Must Inverter, begin by restarting the inverter with only the battery connected. Check if it functions correctly. Then, connect both the battery and utility power but keep the switch off to see if the inverter charges the battery. If not, inspect and repair the main board.
Procedures for testing the inverter's functionality in battery operating modes.
Steps to inspect and test the BUS module for faults.
Procedures for diagnosing issues within the BUCK circuit.
Instructions for inspecting power components and drivers in the invert full bridge.
Guidance for testing the components within the BUS soft start circuit.
Procedures for verifying the AC switch-on power supply circuit.
General| Model | PH1800 PLUS 4K |
|---|---|
| Input Voltage | 230 VAC |
| Output Voltage | 230 VAC |
| Output Voltage Regulation | ±5% |
| Frequency | 50 Hz/60 Hz (Auto sensing) |
| Efficiency | 93% |
| Waveform | Pure sine wave |
| Battery Voltage | 48 VDC |
| Floating Charge Voltage | 54 VDC |
| MPPT Range @ Operating Voltage | 60-115 VDC |
| Maximum PV Array Open Circuit Voltage | 145 VDC |
| Maximum Charging Current | 80A |
| Maximum AC Charging Current | 60A |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Cooling | Fan cooling |
| Weight | 12 kg |
| Selectable Voltage Range | 170-280 VAC (For Personal Computers), 90-280 VAC (For Home Appliances) |
| Protection Features | Overload, short circuit |
| Operating Temperature Range | 0°C |
| Storage Temperature | 60°C |
| Transfer Time | 10ms |
| Rated Power | 4000W |
| Surge Power | 8000W |
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