Delta M50A 260, Operation And Installation Manual, Page: 59 / 88

Surge protection devices (SPD) are designed to protect sensitive circuit
elements of the inverter from damage caused by lightning and other electrical
transients/surges, as such they are sacrificial components and periodically,
may need replacement.
The SPDs are located in the inverter.
If a warning message “AC Surge” or “DC Surge” appears on APP and DSS,
follow the procedure below to replace the SPD.
• Determine which SPD unit is damaged. See
Figure 5-4.
AC SPD/DC SPD: Show on the corner of the LED panel.
Figure 5-4: Display Indicating AC and DC SPD failure
LED Indicator
(RED FLASH)
LED Indicator
(GRN ON)
LED Indicator
(GRN ON)
59
Maintenance