Hoshizaki Flaker 4 Beeps: Repeat High-Pressure Switch
Four beeps on a Hoshizaki F-1501M or F-2001M flaker mean the high-pressure switch has activated a third time within one hour. Turn power off and call for service. Leave the icemaker off until the cause is resolved to avoid possible catastrophic failure.
High: the third trip in an hour means the manual requires power off until the cause is resolved.
- Code
- 4 beeps
- Maker
- Hoshizaki
- Equipment
- Ice machines
- Applies to
- DCM cubelet ice maker/dispenser and F-2001 / F-1501 "J" flakers (5-second beep interval)
What does Hoshizaki error code 4 beeps mean?
This is the escalation of the three-beep alarm. The high-pressure switch protects the compressor from excess pressure. When it activates a third time within one hour, the control no longer treats it as an occasional event. Four beeps tell you that something is repeatedly driving the pressure up, and that the compressor is being cycled against it. The manual's instruction is firm: turn power off, call for service, and keep the icemaker off until the cause is resolved, because continuing could lead to a catastrophic failure. The usual suspects are a blocked or dirty condenser, a failed condenser fan, a very hot installation, or a problem in the refrigerant circuit, but only measurement shows which. Do not keep restarting the machine to see whether it runs.
Affected models and control systems
F-1501M and F-2001M J-board modular flakers; the same alarm table in the manual is marked for DCM models where it applies.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Four beeps
- Machine stopped repeatedly
- Hot discharge line or condenser
- Third trip within an hour
Possible causes
Likely causes — what usually sits behind error code 4 beeps on this control. A technician confirms which one it is before any part is replaced.
- Third high-pressure switch activation within 1 hour
- A condenser that has become severely blocked
- A fan motor that has stopped
- A restriction or overcharge in the refrigerant circuit
Safe checks before calling for service
- Turn the power off at the machine, as the manual says.
- Do not restart it to test whether the alarm returns.
- Keep the area around the machine clear and cool.
- Write down the times of the earlier three-beep alarms and call service.
How a technician diagnoses error code 4 beeps
- Confirm the alarm and the history of the trips.
- Inspect and clean the condenser and check fan operation.
- Attach gauges and read the high-side pressure under controlled conditions.
- Check for refrigerant restrictions, charge level and non-condensables.
- Repair the cause before releasing the machine to run.
- High-side pressure testing is done on the sealed refrigerant circuit with licensed tools.
- Running the machine against a trip can damage the compressor beyond repair.
- Fan and compressor checks involve live circuits.
How error code 4 beeps differs from similar codes
4 beeps is the third high-pressure trip and needs power off; 3 beeps is the first or second trip and resets itself.
Technical reference
- Maker documentation
- Hoshizaki owner support
- Edition
- Issued 11-15-2021, revised 8-18-2023
- Models / control
- DCM cubelet ice maker/dispenser and F-2001 / F-1501 "J" flakers (5-second beep interval)
- Section
- L. Alarm Safeties, p. 40
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Hoshizaki ice machine error codes
Why does the manual say catastrophic failure?
Repeated high-pressure trips can damage the compressor if the machine keeps running.
Can I reset and try again?
No. The manual says to leave the icemaker off until the cause is resolved.
What about the earlier 3 beeps?
Those were the first and second trips. Note when they happened for the technician.
Need help with Hoshizaki error code 4 beeps?
A technician confirms the cause on site and gives you the price in writing before any work starts.