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Error code · Taylor · Slush & frozen drinks

Taylor Slush Machine Error Code Chk Refrig Sys Psi: High Head Pressure

On the Taylor C300 slush freezer, Chk Refrig Sys Psi means the compressor went out on high head pressure. The machine turns off, and the message clears once the condition is corrected. Switch it off and let it rest, clear the air space and vents, and on a water-cooled unit check the water supply is on.

Medium · inspection needed

High: the compressor goes out and the machine turns off until the cause is corrected.

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Code
Chk Refrig Sys Psi
Maker
Taylor
Equipment
Slush & frozen drinks
Applies to
Model C300 frozen carbonated beverage / slush freezer

What does Taylor Chk Refrig Sys Psi mean?

A refrigeration system has to throw away the heat it collects from the product, and it does that at the condenser. The head pressure is the pressure on the high side of the compressor, and it climbs when heat is not leaving the system well. The C300 control has a protective switch for that pressure. When it trips, the compressor goes out, the machine turns off and the display shows Chk Refrig Sys Psi. The message clears once the condition is corrected. The system is shedding heat poorly, and in a hot kitchen the usual reasons are blocked airflow, a dirty condenser, or too little cooling water on water-cooled units. The manual lists airflow around the freezer and the condenser, condenser cleanliness, the cooling water supply on water-cooled units, and the condenser fan and the refrigeration system pressure. Because grease and dust collect in a condenser over time, a unit that ran for months without cleaning is the typical case.

Affected models and control systems

Taylor Model C300 frozen carbonated beverage / slush freezer.

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

  • The machine shuts off with Chk Refrig Sys Psi on the display
  • The product in the barrels warms and softens
  • The cabinet and surrounding air feel hot

Possible causes

Listed in Taylor's documentation

  • Airflow around the freezer and the condenser
  • Condenser cleanliness
  • Cooling water supply on water-cooled units
  • Condenser fan and the refrigeration system pressure

Other likely causes — what usually sits behind Chk Refrig Sys Psi on this control. A technician confirms which one it is before any part is replaced.

  • Boxes or a wall placed too close so the exhaust air recirculates
  • A water-cooled unit whose shutoff valve was closed during a plumbing job

Safe checks before calling for service

✓ What an operator can do
  1. Switch the machine off and let it rest.
  2. Check that nothing blocks the air space around the freezer and that vents are clear.
  3. On a water-cooled unit, check that the water supply to the machine is on.
  4. Do not touch the refrigeration lines or the condenser, and tell us how long the unit had been running before it stopped.

How a technician diagnoses Chk Refrig Sys Psi

  1. Read the message and ask whether the unit is air-cooled or water-cooled.
  2. Inspect and clean the condenser and confirm the fan runs.
  3. On water-cooled units, check water flow and temperature at the condenser.
  4. Measure head pressure with gauges and compare it with the limit.
  5. Check the high-pressure switch operation.
  6. Repair the cause before restoring the compressor to service.
! Leave this to a technician
  • The refrigeration circuit is pressurized and needs gauges and certified handling.
  • Condenser fans and the compressor carry live voltage.
  • Repeated restarts on high head pressure can damage the compressor.

Technical reference

Document
Model C300 Operator's Manual (updated 9/2/2020), User Interface p.5-2 to 5-4
Edition
055072-M; original publication 9/26/08, updated 9/2/2020
Models / control
Model C300 frozen carbonated beverage / slush freezer
Section
Section 5 User Interface - Table 5-1 Fault Messages p. 5-2 (PDF p. 20); fault explanations pp. 5-3 to 5-4 (PDF pp. 21-22)
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.

→Same maker

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Chk Refrig Sys PsiQuestions about Taylor Chk Refrig Sys Psi
Will Chk Refrig Sys Psi clear on its own?

The message clears once the condition is corrected, so cleaning airflow or restoring water may be enough.

Can I clean the condenser myself?

Do not touch the condenser or lines. We clean it safely during service.

Why does a hot kitchen matter?

The condenser has to push heat into the room, and hot air makes that harder.

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