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[Alert] Inlet Water Unavailable or Temporarily Unavailable, CT 1.5 (Compact Chiller)

Updated

Overview

The Inlet Water Unavailable (or Temporarily Unavailable) alert indicates that the compact chiller detects a possible issue with the incoming water supply, resulting in zero or negative water pressure being read by the buffer tank pressure sensor. This article provides steps to troubleshoot this issue on a Countertop 1.5 (CT 1.5) with compact chiller.

Alert Details

Inlet Water Temporarily Unavailable - This alert triggers first if the buffer tank pressure sensor reads < 0 PSI at 1 minute after a dispense (single reading).

For 24 hours after the initial alert is fired, the machine will periodically open the inlet valve and attempt to fill the buffer tank. A “Bevi Needs Water” screen displays while the machine checks for restored pressure.

If the sensor goes above > 0 PSI in that period, the alert will auto-resolve.

Inlet Water Unavailable - This alert triggers if the Inlet Water Temporarily Unavailable alert is active for more than 24 hours. This alert will not auto-resolve, and requires troubleshooting.

In this article (click to jump):

Troubleshooting Steps

The troubleshooting process for the inlet water alerts involves checking systems from the external supply inward.

Task 1: Verify supply shutoff valves are open.

  1. Locate the 3/8 water line on the back of the chiller, trace it to the source, and confirm all external supply shutoff valves are in the open position.
  2. If a supply shutoff valve was found to be closed, open it.
  3. Go into Troubleshooting Tools and Open Inlet.
    • Observe the internal buffer tank pressure.
    • If pressure recovers (goes up):
      • If the alert was “Temporarily Unavailable” it may auto-resolve, or can be resolved in Service Panel > Alerts & Troubleshooting screen.
      • If the alert was "Unavailable," manually resolve the alert.
      • Test dispense and complete the service.
  4. If pressure does not recover, proceed to Task 2.

Task 2: Verify external water supply.

NOTE: Refer to “How to Measure Your Site’s Water Pressure & Flow Rate” for additional details on testing methods.

  1. Turn off the closest shut-off valve before the inlet.
  2. Turn off the buffer tank.
    1. Rotate valve on front panel to Closed position.
  3. Enter Troubleshooting Tools.
    1. Gear Icon > Start Service > enter PIN > Alerts & Troubleshooting > Troubleshooting Tools
  4. Under Dispense, pour some cold (still) water to help depressurize the inlet.
  5. Disconnect the supply water line before the inlet and run it into a bucket.
  6. Open the shut-off valve to check the supply line for water flow and pressure (using a pressure gauge).
    1. If water flow/pressure is insufficient (ex., below 40 PSI or poor flow rate), the issue is external to the machine. Contact facilities management.
    2. If water flow/pressure is good, turn the external valve off, reinstall the supply line back into the compact chiller, turn the external valve back on, and open the buffer tank. Proceed to Task 3.
      1. Rotate the buffer tank valve counterclockwise to the Open position.

Task 3: Check Internal Water Path Components (Buffer Tank Valve, Filter, Solenoid)

  1. Buffer Tank Valve Check:
    1. Check and confirm the buffer tank valve is open. A closed valve will cause the pressure sensor to read zero/negative.
    2. Open the inlet in Troubleshooting Tools, and check data for pressure recovery.
    3. If pressure recovers, resolve the alert and complete the service.
  2. Water Filter Check:
    1. Check that the water filter is installed, and confirm its lifetime.
      1. Reseat the filter in the filter head.
      2. Replace the filter if needed.
    2. Open the inlet in Troubleshooting Tools, and check for pressure recovery.
    3. If pressure recovers, resolve the alert and complete the service.
  3. Inlet Solenoid Isolation:
    1. If pressure is still zero, close the buffer tank.
      1. Rotate buffer tank valve clockwise to Closed position.
    2. Pull out the filter flush valve tube and run into a bucket. Open the filter flush valve by rotating the valve to the Open position.
    3. Open the inlet solenoid in Troubleshooting Tools, and check for water flow.
      1. If there is water flow through the flush valve, the issue is likely a bad sensor (skip to Task 4).
      2. If there is no water flow, close the filter flush valve. Move on to check the inlet solenoid, its cable/connections, or the BUC board in the next steps.
  4. Power off the chiller using the front switch.
  5. Inspect and reseat the inlet solenoid wiring connections at the inlet solenoid.
    1. Remove chiller top panel to access inlet solenoid connections.
    2. Check for damage and reseat the connections.
      1. Polarity does not matter for these two connectors.

  1. Remove side PCB panel to access BUC board. Check the Valves & Agitator harness connector.
    1. There is a lock latch on the connector that needs to be depressed to disconnect the cable.
    2. When reconnecting, ensure the connector is fully seated and clicks into place.

  1. Power on the compact chiller, and enter Troubleshooting Tools.
  2. In Troubleshooting Tools > Controls, open the inlet.
  3. Open the filter flush valve (ensure it is still directed into a bucket), and check for flow.
    1. If flow is restored, close the flush valve. Confirm pressure recovery under Data > Water. Resolve the alert, and complete the service.
    2. If flow is still not restored, the solenoid, cable/connections, or BUC board may have failed.
      1. 720-0332 FRU - INLET VALVE
      2. 720-0329 FRU - BUCB - KIT
      3. 111615-01 CABLE - VALVE AND AGITATOR

Task 4: Diagnose Buffer Tank Pressure Sensor

  1. If water flow is confirmed but the buffer tank pressure still reads zero or below, the issue could be a faulty buffer tank pressure sensor or connection.
  2. Confirm the machine can dispense cold water in Troubleshooting Tools (this proves water is successfully moving through the system despite a 0 or negative pressure reading).
  3. Check and reseat the sensor connections on the buffer tank pressure sensor and the water pressure sensor harness connection.
    1. If pressure recovers after reseating the cables, resolve the alert and complete the service.
    2. If pressure does not recover, replace the buffer tank pressure sensor.
      1. 720-0336 FRU - BUFFER TANK PRESSURE SENSOR
  4. If replacing the sensor does not resolve the issue, contact Bevi support.
bevi droplet favicon.png If you have any questions or need further assistance, please contact Bevi Technical Services at support@bevi.co, or call our support line at 866-704-2384 (BEVI)