Victory Commercial Refrigerator Error Code LP / Pd / AtS: Pump-Down Alarms
LP, Pd and AtS are pump-down messages on Victory reach-ins with the VCC controller. LP is a low pressure alarm with the compressor off, Pd means maximum pump-down time was reached, and AtS means a restart during pump down. Check the food temperature, do not open panels, and call for service.
High: low pressure can stop cooling, so food is at risk until the refrigeration side is repaired.
- Code
- LP / Pd / AtS
- Maker
- Victory
- Equipment
- Reach-in refrigerators
- Applies to
- Victory VCC controller
What does Victory error code LP / Pd / AtS mean?
Pump-down is how the VCC controller manages refrigerant when the compressor is about to stop. The control closes a valve, lets the compressor draw refrigerant out of the evaporator, and stops the compressor when pressure falls to a set value. LP is the low pressure alarm, and the compressor is off when it appears. Pd appears when the pump-down took longer than the maximum time allowed. AtS shows the cabinet restarted while a pump-down was in progress. The display shows LP, Pd or AtS. These point to the refrigeration side and its pressure devices, not to door habits or loading, which is why simply waiting rarely fixes them. Because low pressure can stop cooling entirely, the food needs attention while the cause is found.
Affected models and control systems
This applies to Victory reach-ins with the VCC controller, such as the RSA-1D-S1-HC, per the RS/RSA alarm codes table. The messages depend on the cabinet having a pressure device in its refrigeration circuit.
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
- LP, Pd or AtS on the display
- Compressor silent while the box warms
- Compressor starting and stopping repeatedly
- Frost on the evaporator or no cold air at the fan
Possible causes
Listed in Victory's documentation
- Low refrigerant charge
- A pressure switch or transducer reading wrong
- A valve in the refrigeration circuit not sealing
- Wiring to the pressure device
- Iced evaporator coil
Other likely causes — what usually sits behind error code LP / Pd / AtS on this control. A technician confirms which one it is before any part is replaced.
- Slow leak at a flare or braze joint that has lost charge over months
- Liquid line solenoid that leaks through, so pressure never pulls down in the allowed time
- Brief power interruption during pump-down that triggers AtS on restart
Safe checks before calling for service
- Write down which message is showing, LP, Pd or AtS.
- Test the food with a thermometer, since low pressure can stop cooling.
- Move perishable food to another cooler if the cabinet is warm.
- Do not open panels.
- Photograph the display and note when the cabinet last cooled normally.
How a technician diagnoses error code LP / Pd / AtS
- Read the message and any history on the VCC controller.
- Connect gauges and compare suction pressure with the cutout and cut-in values.
- Check the pressure switch or transducer against gauge readings.
- Test the liquid line valve for sealing.
- Check wiring to the pressure device for damage.
- Leak-test the system before recharging.
- Reading and adjusting pressures means connecting gauges to a sealed refrigeration circuit.
- Victory cabinets use flammable hydrocarbon refrigerant, so leak work must be done by a technician.
- The pressure device and valve circuits are live and sit behind panels.
How error code LP / Pd / AtS differs from similar codes
These are pressure and refrigerant messages, unlike HI and LO on the same controller, which are plain temperature alarms.
Technical reference
- Document
- Victory RS/RSA manual 809-190A Rev 02/26, Alarm codes table
- Maker documentation
- Victory owner support
- Edition
- 809-190A Rev H. 02/05/2026 (footer Rev. 02/26)
- Models / control
- Victory VCC controller
- Section
- Alarm Codes table, printed pp. 23-24 (viewing alarm codes 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.
Related Victory reach-in refrigerator error codes
What does Pd mean?
The pump-down took longer than the maximum time the control allows, which often points to a valve not sealing.
Can the cabinet recover by itself?
Seldom. If low pressure is the cause, the cabinet will not cool until the refrigerant side is fixed.
Is AtS the same as LP?
No. LP is a low pressure alarm, while AtS records a restart during pump down.
Need help with Victory error code LP / Pd / AtS?
A technician confirms the cause on site and gives you the price in writing before any work starts.