Diagnostic report for McGann Pay Station display failure after cold weather. Includes troubleshooting, safety warnings, and prevention tips for commercial kiosks.
Ensure the replacement display is rated for temperatures as low as -40°C.
This information is required to source a replacement controller board.
Diagnostic codes can help pinpoint the source of the issue.
LCD display modules are susceptible to temperature-related degradation. Specifically, low temperatures can increase the viscosity of the liquid crystal material, reducing response time and potentially causing a persistent 'Out of Order' display. DC voltage fluctuations (typically 24V in bill validators) caused by cold-induced component changes can also affect display controller operation. Signal attenuation in the display cable due to temperature-related changes in conductivity can further impact performance. ESD (Electrostatic Discharge) risks are elevated in cold, dry air.
The McGann Pay Station displays an 'Out of Order' message on the screen following a period of cold weather.
High voltage is present within the pay station. Only qualified personnel should perform maintenance. Lockout/Tagout (LOTO) procedures are mandatory before performing any maintenance on the device. Ensure proper grounding to prevent electrostatic discharge (ESD).
Regularly inspect cable connections for corrosion and ensure they are securely fastened. Consider using a climate-controlled enclosure or a display with a wider operating temperature range. Apply conformal coating to the display controller board to protect against moisture and corrosion.
If the display has a brightness adjustment, try cycling it to its maximum and minimum values several times. This might help dislodge any stiction in the LCD panel if the issue is temperature-related. Additionally, check for any firmware updates for the pay station that may address cold-weather display issues.