Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 250

Error definition and error
Error Code
detection method
1301 Abnormal low When starting the com-
pressure pressor from Stop Mode
for the first time if low-
pressure reads
0.098MPa [14psi] imme-
diately before start-up,
the operation immediate-
ly stops.
Cause
(1) Inner pressure drop due to
a leakage.
(2) Low pressure sensor fail-
ure
(3) Short-circuited pressure
sensor cable due to torn
outer rubber
(4) A pin on the male connec-
tor is missing.
(5) Disconnected wire
(6) Failure of the low pressure
input circuit on the control-
ler board
- 241 -
[ IX Troubleshooting ]
Check method and remedy
Refer to the section on troubleshoot-
ing the low pressure sensor.