Follett HI AMPS Error Code

What does Follett HI AMPS mean?

The PC board monitors the auger gearmotor's current draw. On a Horizon icemaker, current above the 3.8 amp limit shuts the machine down and lights the TIME DELAY, HI AMP and SERVICE LEDs as a soft error. A second HI AMP within the six-hour countdown, or a no-current reading while the drive relay is energized, escalates to a hard error that locks the machine off.

Symptoms

• TIME DELAY, HI AMP and SERVICE LEDs illuminate on a soft fault.
• Machine shuts down, then restarts and clears the LEDs after the time delay on a soft fault.
• HI AMP and SERVICE LEDs stay lit and the machine will not restart on a hard fault.
• On 7 and 15 Series dispensers the HI amps and Time delay LEDs light and the unit shuts down for one hour.

Common causes

• Auger gearmotor drawing current above the limit (3.8 A on Horizon, 0.55 A on 7/15 Series).
• Second HI AMP occurrence within the six-hour countdown after a HI AMP time delay (hard error).
• Drive relay energized with no current draw to the gearmotor, indicating a stalled or open motor (hard error).
• Mechanical binding in the auger or evaporator increasing motor load.
• Gearmotor or drive-circuit failure.

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Diagnostic steps

1. Read the LED combination

   Confirm whether TIME DELAY plus HI AMP plus SERVICE are lit (soft, self-resetting) or HI AMP plus SERVICE only stay lit (hard, requires the reset button). The manual notes a hard error is not cleared by cycling power.

2. Allow the soft time delay to run

   For a soft HI AMPS, let the time delay expire. The Horizon machine restarts and clears the LEDs automatically; a 7/15 Series unit resumes after about one hour.

3. Check the auger for mechanical binding

   Inspect the evaporator and auger for binding or obstruction that would raise gearmotor current draw, since the board trips on the over-current condition.

4. Verify gearmotor current draw

   Measure the auger gearmotor amperage against the rated limit to confirm whether the motor itself is the over-current source or whether the load is mechanical.

5. Investigate the no-current case

   If the drive relay is energized but the board reports HIGH AMP and SERVICE with no current draw, check for an open gearmotor circuit, since the board flags this to prevent the refrigeration system running without auger rotation.

6. Reset a hard error

   After correcting the fault, press the reset button to clear a hard HI AMPS error; cycling power alone will not reset it.

When to call a professional

Diagnosing a HI AMPS fault means measuring gearmotor amperage on a live 208-230 V circuit and assessing auger and drive components behind a cover that carries moving and hot parts. The manual warns not to operate with the front cover removed and to disconnect power before servicing. Repeated or hard HI AMPS faults, no-current readings, or any gearmotor replacement should be handled by a Follett-authorized service technician to avoid shock or injury.