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A: 1. Battery test discharges the UPS battery for 20 seconds.
2. Battery maintenance discharges the UPS until the battery voltage is low.
3. Stop test terminates the battery discharge test.
Note: The UPS load rate must be greater than 5% during testing; otherwise, clicking these function buttons will not change the equipment's operating mode (no change whatsoever).

Q: Our machine connects to the customer's lamp, and the lamp flashes. Replacing the competing product (Reros) is normal.
A: Our machine does not meet the C2 standard in the UPS EMC test. If you want to use it, you need to add an EMC filter or replace it with a machine that meets the C2 standard, such as the HRD33.

MTR V2.03C Software connection and Operation Guide
PC-to-UPS Communication & Parameter Configuration
Applicable Models: RMX(C) Full Series
Q: I purchased an RMX series UPS from your company recently. I want to modify the UPS rated parameters and application settings via MTR, but keep getting connection failures. What is the correct connection procedure?
A: Please follow the detailed steps below:
1. Preparation
1）Prepare a USB-to-RS232 communication cable.
2）Install the corresponding driver on your PC.
3）Verify successful driver installation in Device Manager of your PC
(Connect the USB end of the cable to the computer first for this check).
2. Hardware Connection
Connect the RS232 end of the USB-to-RS232 cable to the corresponding port on the UPS.
3. Communication Settings
Check that the ‘COM.’ item on the UPS matches the connection settings in the MTR main interface(At the bottom of the software), then click the Connect button.Once connected, “UPS connected” will appear in the lower-left corner of MTR.
Note: The above 3 steps are critical for successful MTR connection. 
4. Password for Parameter Settings
Password for RateSetting and ServSetting in MTR: 12345678

Troubleshooting for Simultaneous UPS Fault Codes 16, 20, 28
Applicable Models: HT(R)X 01–20KVA S L
Q: The UPS shows fault codes 16, 20, 28 at the same time. According to the maintenance manual, these indicate “Utility Abnormal”, “Bypass Volt Abnormal” and “Bypass Freq Over Track”. How to troubleshoot?
A: When these three faults appear together, the cause is very likely abnormal input power supply. Please follow the steps below to diagnose:
1.Check whether the input power supply to the UPS is abnormal.This kind of fault is especially common when the power source is a generator, transformer, or similar equipment.
2.Check that all circuit breakers connected to the UPS are closed,especially the input and bypass circuit breakers on the UPS.
3.Check for internal module faults on the UPS input side,such as a blown input fuse.

1.6-20KUPS cannot directly set 21-24 lead-acid batteries on the display screen and needs to be set in MTR software. Standard software can support 21-24 lead-acid batteries.
2.If the customer needs to directly connect 21-24 lead-acid batteries to the UPS on the display screen, the UPS software needs to be programmed as the non-standard program.

The oil leaking from the motor shaft is rust preventive oil. Its purpose is to prevent the shaft from rusting during transportation. This is a normal phenomenon and not a fault.

Troubleshooting steps:
1. Check whether the wiring between the access control machine and the sliding door is correct. On the access control machine side, there are four wires: COM, NO, SEN, GND. On the sliding door access control machine side, connect NO to the access control signal input, COM to the common terminal, and SEN to the interlock output.

Troubleshooting steps:
1-Check the protection status: Status → Protection Status → Filter clogged (normally it is CLOSE; alarm is OPEN).
2-If the status is OPEN, manually reset the alarm and observe whether the status in step 1 changes.
3-If it changes, the alarm logic is fine; other components (filter, differential pressure switch) need to be checked.
4-After resetting the alarm, open the rear door and observe whether the alarm reappears.
5-If the alarm continues to appear, it means the issue is unrelated to the filter; the airflow switch needs to be checked.
6-Check whether the detection port of the airflow switch is blocked, and whether the airflow switch threshold setting is correct.

1. Check whether the voltage of the switchgear at the front end of the inverter is normal
 2. Check whether the inverter input voltage coefficient is normal; the default is 100%. 
3. Check whether the voltage detection board is working properly and verify its specifications and model
 4. If the actual measured voltage matches the customer's on-site voltage, adjust the input voltage detection coefficient to keep the inverter and the customer's site voltage consistent, avoiding system misidentification of undervoltage and accidental tripping