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Каталог·Manuals·YORK·YORK YK·Fault codes·Flip Dot Does Not Turn Black or Flips from Black to Red

Fault · YORK YK · Water-cooled centrifugal chiller

YORK YK — Flip Dot Does Not Turn Black or Flips from Black to Red

On the display

The panel reads Flip Dot Does Not Turn Black or Flips from Black to Red. The manual prints this exact wording, lists no other variant of it, and places it as a PROBLEM entry in its troubleshooting table.

What it means

When power is applied, the flip dot should turn black. With this condition it does not: the dot either never turns black, or it flips from black to red instead. The manual traces the condition to the 24 VDC supply on the 031-03958 board, to the sensor bases and sensors, to the L1 wire at TB1, or to the board itself.

Why it appears

  • 24 VDC is not present between TB1 terminals R and L, or at TB1 terminal L1, on the 031-03958 board.
  • The sensor bases are wired incorrectly, or the sensors are not installed correctly into their bases.
  • The L1 wire at TB1 is installed incorrectly, or wire insulation is present in the terminal.
  • The 031-03958 board has failed.

What to check

  1. Measure the DC voltage between TB1 terminals R and L on the 031-03958 board.
  2. If the reading is 24 VDC, replace the 031-03958 board.
  3. If the reading is not 24 VDC, measure the DC voltage at TB1 terminal L1 on the 031-03958 board.
  4. At the same time, confirm that the sensor bases are wired correctly and that each sensor is installed correctly into its base.
  5. If the voltage at TB1 terminal L1 is still not 24 VDC, remove the TB1 connector.
  6. Re-measure the DC voltage at TB1 terminal L1 on the 031-03958 board with the connector removed.
  7. If this second reading is 24 VDC, check that the L1 wire on TB1 terminal L1 is fitted correctly and that no wire insulation is caught in the terminal.
  8. If the reading is still not 24 VDC, replace the 031-03958 board.
  9. If the problem is still not solved after all of this, contact PTS.

Setpoints and thresholds

  • 24 VDC — the DC voltage level every measurement in the procedure is judged against: first between TB1 terminals R and L, then at TB1 terminal L1, both on the 031-03958 board.

Questions engineers ask

What does Flip Dot Does Not Turn Black or Flips from Black to Red mean on a YORK YK?

It means that when power is applied, the flip dot does not turn black, or it flips from black to red. The manual ties the condition to missing 24 VDC at TB1 on the 031-03958 board, incorrectly wired sensor bases or poorly seated sensors, a badly fitted L1 wire, or a failed 031-03958 board.

How do I troubleshoot the flip dot fault on a YORK YK?

Measure the DC voltage between TB1 terminals R and L on the 031-03958 board; 24 VDC there means the board is replaced. If not, measure at TB1 terminal L1 while checking the sensor bases and sensors, then remove the TB1 connector and measure again — 24 VDC then points to the L1 wire, no 24 VDC to the board.

When does the 031-03958 board need to be replaced for this fault?

The manual calls for a new board when the voltage between TB1 terminals R and L reads 24 VDC, or when the voltage at TB1 terminal L1 is still not 24 VDC after the TB1 connector is removed. If the steps do not solve the problem, contact PTS.

Messages next to this one

Source

Written from the manufacturer's manuals for the YORK YK; every number and designation on this page is checked against them before publication. The row of the manual this message comes from:

All YORK YK messages: fault codes · YORK YK documentation · YORK manuals