Mitsubishi Electric PUHY-(E)P200 Service Handbook page 169

[ IX Troubleshooting ]
1. Error Code
1301
Abnormal low pressure
2. Error definition and error detection method
When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately
before start-up, the operation immediately stops.
3. Cause, check method and remedy
(1) Inner pressure drop due to a leakage.
(2) Low pressure sensor failure
(3) Short-circuited pressure sensor cable due to
torn outer rubber
(4) A pin on the male connector is missing.
(5) Disconnected wire
(6) Failure of the low pressure input circuit on the
controller board
HWE07010
Cause Check method and remedy
Refer to the section on troubleshooting the low pressure
sensor.(page 223)
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