How to Troubleshoot the Issue where Controller Status is Shown as Down in xPortal Software while the LED Indicators of the Controller are Blinking Abnormally or Remained Lighted Up

Problem (Issue) Statement:	How to troubleshoot the issue where controller status is shown as Down in xPortal software while the LED indicators of the controller are blinking abnormally or remained lighted up.
Description:	A guide to troubleshoot the controller status being down when the LED indicators of the controller are blinking abnormally or remained lighted up.
Related Software:	xPortalNet software v1.5 xPortal3000
Related Hardware:	XP-SNET Series Controller XP-M Series Controller XP-GLS Series Controller XP-GT Series Controller
System Application:	Door Access System Lift Masking System Turnstile Access System Vehicle Access System
Symptom and Finding:	Customer complained that the controller status is shown as Down in the respective xPortal software. Technical support attending to the site is also unable to ping the IP address of the IP controller through Command Prompt. When the technical support looked at the controller, it is discovered that the LED indicators of the controller are blinking abnormally or remained lighted up.
Cause:	Output voltage from the 12Vdc switching power supply is too low and not within the tolerances of ±10% of 12Vdc range (11Vdc to 13.2Vdc)
Solution:	Summary: To check the incoming power supply to the controller (12VDC). To check the incoming power supply to Switching power sully unit (240VAC). . Step-by-step Guide: Tips Users are required to prepare a digital multi-meter and a network tester kit to troubleshoot for this issue. To check the incoming power supply to the controller (12VDC): Step 1: Press SELECT button to change the voltage measuring mode to DC (Direct Current) voltage. Figure 1: Pressing SELECT Button to Change the Voltage Measuring Mode to DC Voltage . Tips The display screen will show the following symbol when the digital multi-meter is in DC voltage mode. Figure 2: The Symbol Indicating the Digital Multi-meter is in DC Voltage Mode . . Step 2: Touch the BLACK probe to the COM terminal and the RED probe to the V terminal on the switching power supply to measure the power supply output voltage Figure 3: Touching the Black Probe to COM Terminal and the Red Probe to the V Terminal to Measure Power Supply Output Voltage . Step 3: User will be able to read the voltage values displayed on screen. Practically the voltage values should be ±10% of 12VDC. Different switching power supply may deliver different DC output. User may check on the specification of the switching power supply for reference. . Step 4: Touch the BLACK probe to the 0V terminal and touch the RED probe to the 12V terminal on the incoming power connectors for the controller as shown below using the XP-M2000i as an example. User will be able to read the voltage values displayed on screen which practically should be ±10% of 12VDC. Figure 4: Touching the Black Probe to 0V Terminal and Touching the Red Probe to 12V Terminal to Read Voltage Received by the Controller . Step 5: If, read the voltage value less than 12Vdc from switching power supply unit, please replace a new switching power supply unit. Note As a safety precaution, user to confirm the incoming power supply is within ±10% of 240VAC as unstable incoming power supply will also spoil the switching power supply. . . To check the incoming power supply to Switching power sully unit (240VAC): Step 1: Press SELECT to change the voltage measuring mode to AC (Alternating Current). Figure 5: Changing the Multi-meter to Measure AC Voltage . Tips The display screen will show the following symbol when the multimeter is in AC voltage mode. Figure 6: The Symbol Indicating the Digital Multi-meter is in AC Voltage Mode . Step 3: Touch the BLACK probe to the NEUTRAL terminal and touch the RED probe to the LIVE terminal on the switching mode power supply unit. Figure 7: Touching the Black Probe to Neutral Terminal and the Red Probe to the Live Terminal on the Switching Mode Power Supply . Step 4: Switch ON the power supply and you will be able to read the voltage values displayed on screen. If the incoming power supply 240VAC was tested ok, user may continue on to check the incoming power supply 12Vdc to controller. Figure 8: Measuring the AC Voltage for the Switching Mode Power Supply Unit . Note Theoretically the tolerance level defined by IEC60947-2 is 0.85% for minimum nominal voltage (Un) and 1.1% for maximum nominal voltage (Un). Example: For Un = 230/240V, Minimum tolerance Level is (0.85% of 230V AC) = 195.5V, Maximum tolerance Level is (1.1% of 240V AC) = 264V. Reference link: https://www.se.com/my/en/faqs/FA22612/
Common Issue:	NIL
Date Documentation:	24/3/2020 (Rev 1.0)