Randell HI

What does Randell HI mean?

On a Randell prep table, the high-temperature alarm shows as HI on the Carel controller and Hi on the Danfoss controller. It means the cabinet temperature has risen above the controller's high-temperature alarm threshold, so the unit is warmer than the set point for the rail or base it monitors, which puts stored product at risk.

Symptoms

• Display shows HI (Carel) or Hi (Danfoss) with the alarm LED lit
• Cabinet or product is warmer than the desired set point
• A door or drawer may be ajar or not sealing
• Unit struggles to cool back down to its set point

Common causes

• Door or drawer ajar, or a torn or misplaced gasket
• Incorrect (too high) set point
• Dirty condenser coil restricting airflow
• Recent large or warm product load, or a refrigeration fault

Diagnostic steps

1. 01

   Confirm the high alarm

   Verify the display reads HI (Carel) or Hi (Danfoss) with the alarm LED lit.

2. 02

   Inspect door and drawer sealing

   The Danfoss table's first action for a high-temperature alarm is to inspect door/drawer sealing; close any ajar door and reseat the gasket.

3. 03

   Check the set point

   The troubleshooting list flags an incorrect set point as a cause of a warm unit; adjust the control set point if it is set too high.

4. 04

   Clean the condenser coil

   A dirty condenser reduces cooling; clean the condenser coil per the monthly maintenance procedure so airflow and heat transfer are restored.

5. 05

   Contact service if it persists

   If the alarm remains after these checks, the Danfoss table directs contacting service; call 888-994-7636.

When to call a professional

Owners can address a high-temperature alarm caused by an open door, set point, or dirty coil. Call a Randell Authorized Service Agent when the alarm persists after these checks or when food safety is at risk, as it may indicate a refrigeration fault. The manual requires factory-authorized service with OEM parts on these R290 units to avoid ignition risk; reach service at 888-994-7636.