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P3-100 user manual
Fuse replacement
Warning! Disconnect the power cable before opening the fuseholder. Replace the fuse with one of
the same type and rating only.
The main fuse is located in a fuseholder (
B
in Figure 2 on page 7) next to the mains power inlet socket.
To replace a fuse:
1. Shut down power and disconnect the power cable.
2. Use a flat-bladed screwdriver to open the fuseholder.
3. Remove and test the main fuse. If it has blown, replace it with a 250 V-rated, 1 A, T (slow-blow) 20 mm
cartridge-type fuse only.
4. Reinstall the fuseholder and reconnect the power cable.
Internal battery
Warning! Risk of explosion if battery replaced by incorrect type. Refer to Martin Professional for
battery replacement.
The unit’s internal real-time clocks are battery-backed to ensure operation when the unit is not powered. The
batteries should last for at least 10 years and are easily replaced when necessary, replacement battery:
Renata CR2032 Lithium Button Cell. If you suspect that the internal batteries are no longer serviceable,
contact Martin Professional for replacement.
Error codes
In the event of a system error, the LEDs on the front panel indicate error codes by a repeating pattern of
flashing the LEDs a number of times in succession, followed by a 1 second pause.
Main board errors are indicated by the bottom four LEDs only flashing as follows:
• 2 flashes - Failed to power up main board
• 3 flashes - Firmware failed to boot
• 4 flashes - Power failed during boot
• 5 flashes - Power failed during normal operation
• 6 flashes - Watchdog timeout expired
Front panel errors are indicated by all LEDs flashing as follows:
• 1 flash - Invalid build version.
• 2 flashes - Unable to determine serial number.
• 3 flashes - SPI flash test failed.
• 4 flashes - Unable to perform front panel factory restore as factory firmware is corrupt.
• 5 flashes - Current front panel firmware is corrupt and there are no valid firmware versions available to
restore.
• 6 flashes - Restored front panel firmware is corrupt.
Front panel errors 1-3 may be generated by the bootloader or the main front panel firmware. Errors 4-6 may
only be generated by the bootloader.
