Error Code [5201]; Error Code [5201,5203] - Mitsubishi Electric HP120TNU-A Service Handbook

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-5

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
7-7-6

Error Code [5201,5203]

1. Error code definition
5201
High-pressure sensor fault (BC controller PS1)
5203
Intermediate pressure sensor fault (BC controller PS3)
2. Error definition and error detection method
When a pressure sensor reading of 4.06 MPa [589 psi] or above OR 0.098Mpa[142psi] or below is detected, error codes
"5201" OR "5203" will appear.
The unit will continue its operation by using other sensors as a backup.
3. Cause, check method and remedy
(1) High pressure sensor failure
(2) Torn wire coating
(3) A pin on the male connector is missing or contact failure
(4) Disconnected wire
(5) High pressure sensor input circuit failure on the control board
HWE18220_GB
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
Refer to the following page(s). [8-5-1 Com-
paring the High-Pressure Sensor Measure-
ment and Gauge Pressure]
Check for damaged wire coating
Check whether a connector pin is missing
Check for disconnected or broken wire
Check the temperature detected by the sen-
sor from the LED monitor. If the temperature
is significantly different from the actual tem-
perature, replace the control board.
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