Error Code [2512] (Control Valve Failure) (Indoor Unit); Error Code [2519] - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ]
7-4-7

Error Code [2512] (Control valve failure) (Indoor unit)

1. Error code definition
Flow control valve fault (indoor unit)
2. Error definition and error detection method
Limit signal that is output from flow control valve is not detected or is not reset after it is detected.
3. Cause, check method and remedy
(1) Loose connectors, wiring fault
(2) Flow control valve fault
(3) Control board fault
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Error Code [2519]

1. Error code definition
Abnormal water pressure drop
2. Error definition and error detection method
1) If the pressure of 10kPa [1.45psi] or lower is detected by the water pressure sensor during operation (the first detection), the
outdoor stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
2) If the pressure of 10kPa [1.45psi] or lower is detected by the water pressure sensor again (the second detection) within 5
minutes after the first stop of the outdoor unit, the outdoor unit will make an error stop, and the error code "2519" will be dis-
played.
3) If the pressure of 10kPa [1.45psi] or lower is detected more than 5 minutes after the stop of the outdoor unit, the detection is
regarded as the first detection, and the operation described in step 1 above will start.
3. Cause, check method and remedy
(1) Clogged pipe
(2) Water leakage
(3) Water supply cutoff
(4) Water pressure sensor error
(5) Circuit board error on indoor unit
(6) Water pressure sensor disconnection
(7) Pump failure
(8) Use of wrong expansion tank
(9) Use of wrong pipe
(10) Installation failure
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- chapter 7
Cause
Cause
Check method and remedy
Check that the flow control valve wiring is properly connect-
ed to CN8A, and check the connectors for loose contact. If
these are not the cause of the problem, replace the flow
control valve.
If no problems are found with the above items, replace the
control board.
Check method and remedy
Check the strainer for clogging. Check the flow rate
in the water circuit.
Check the pressure sensor value on the LED.
Check the pump for problems. See [8-10-11
Checking the Pump Motor for Ground Fault and
Coil Resistance Problems] for the check proce-
dure.
Check the on-site circuit components for proper se-
lection. For the circuit restrictions, see the related
sections.
Check the water feed pressure.
BS_07_E