A 2-Blink Error is a safety-driven emergency shutdown. It occurs when the "watchdog" timer in the Power Module expires because it hasn't heard from the brain of the system.
If you see the LED on the Power Module blinking twice every 5 seconds, it means the Power Module has not received the required "heartbeat" check-ins from the master controller.
To prevent the machine from performing unintended actions or getting stuck in an operation without supervision, the Power Module performs an emergency shutdown of all outputs.
Reboot the Mixmate. Power the system down completely, wait ten seconds, and turn it back on. This often re-synchronizes the communication between the master controller and the Power Module.
If the 2-blink error persists or happens frequently, check the following in order:
Grounding Issues: Inspect the ground connection between the Power Module and the machine frame. A loose or corroded ground can cause "noise" on the communication lines, drowning out the heartbeat signal.
CAN Bus Resistance: Improper resistance is a leading cause of communication drops.
SHUT OFF ALL POWER.
Using a multimeter, measure the resistance between the GREEN and YELLOW wires inside the Power Module.
Target: ~60 Ohms. (If you see 120 Ohms, a terminator is missing; if it's above 70 Ohms, communication will be intermittent).
Power Stability: Check your battery and charging system. Just like the 1-Blink error, low voltage can cause the master controller to "brown out" and stop sending check-in messages before the whole system actually dies.
Master Controller Failure: If the wiring, grounding, and resistance all test perfectly but the 2-blink error continues, the master controller may be failing and require replacement.