Mitsubishi Electric PURY-P72 Service Handbook page 194

[ IX Troubleshooting ]
1. Error Code
1301
Low pressure fault
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
Cause
(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
HWE0803A
Check method and remedy
Refer to the section on troubleshooting the low pressure
sensor.(page 274)
- 185 - GB