Panasonic U-8ME1E8E Service Manual page 41

11. Alarm Information
11-4. High pressure cut and Low pressure cut
11-4-1. Abnormal high pressure
The high pressure switch works when it detects 3.6MPa or more.
If one of the high pressure switches works, whole outdoor units stop and then restart. If the high pressure switch
works after the system start for 4 times, an alarm occurs.
Alarm display
1
11-4-2. Abnormal low pressure
In the following conditions, an alarm occurs.
- When all outdoor units stop in cooling mode and low pressure sensor detects 0.16MPa or lower, and this
condition continues 60 minutes, alarm occurs.
- When an outdoor unit stops in heating mode regardless of system operation and low pressure sensor detects
0.16MPa or lower, and this condition continues 60 minutes, an alarm occurs.
If the following condition occurs after the system starts for XX* times, alarm occurs.
- The low pressure sensor detects 0.05MPa or lower, and this condition continues 2 minutes.
- The low pressure sensor detects 0.02MPa or lower.
Alarm display
* "XX" above is able to set in EEPROM of each outdoor unit
EEPROM setting in main outdoor unit
CODE: B1
Setting No XX
0
1
2
3
4
5
The compressor doesn't start when low pressure detects 0.16MPa or less.
High pressure cut
P04
Low pressure cut
H06
5 (factory preset mode)
10
20
50
3
4
Control Functions - Outdoor Unit
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2WAY SYSTEM