Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 226

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-6 Error Code [5201]
1. Error code definition
High-pressure sensor fault (63HS1)
2. Error definition and error detection method
If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the outdoor unit stops once, turns to anti-
restart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more.
If the high pressure sensor detects 0.098MPa [14psi] or less just before the restart, the outdoor unit makes an error stop, and
the error code "5201" will appear.
During 3-minute antirestart mode, preliminary errors will be displayed on the LED display.
A error is not detected for 3 minutes after the compressor start, during defrost operation, or 3 minutes after defrost operation.
3. Cause, check method and remedy
(1) High pressure sensor failure
(2) Pressure drop due to refrigerant leak
(3) Torn wire coating
(4) A pin on the male connector is missing or contact failure
(5) Disconnected wire
(6) High pressure sensor input circuit failure on the control board
7-7-7 Error Code [5201]
1. Error code definition
5201
Water pressure sensor fault (indoor unit)
2. Error definition and error detection method
When a pressure sensor reading of 1.05 MPa [153 psi] or above OR -0.05 MPa [7.3 psi] or below is detected, error code
"5201" will appear.
3. Cause, check method and remedy
(1) The water inner pressure sensor is open- or short-circuited. (Re-
gardless of the indoor unit operation status)
BS_07_M
Cause
Cause
Check method and remedy
Refer to the following page(s). [8-5-1 Com-
paring the High-Pressure Sensor Measure-
ment and Gauge Pressure]
Check method and remedy
1) Check that the water inner pressure sensor
is connected.
Reset the indoor unit error.
2) Check the water inner pressure sensor wir-
ing for breakage.
Reset the indoor unit error.
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