Discharge Gas Temperature; Current Protection - Panasonic U-4LE1E5 Service Manual

10. Discharge Gas Temperature

11. Current Protection

10-1. Discharge Gas Temperature Protection
Alarm
The compressor upper-limit discharge temperature is 106°C. If the discharge temperature reaches 106°C, then
the compressor stops. If the discharge temperature reaches 106°C 4 times repeatedly after restart, an alarm
occurs. After the compressor stops, if the discharge temperature at the stopped compressor is at or above 101°C,
the compressor start restriction temperature, then this compressor does not operate until the temperature drops.
List of discharge temperature protections
Compressor Compressor
model
Compressor 1
10-2. Control For Detection of Discharge Sensor Failures
• If the temperature is at or above sensor failure temperature (80°C) (value in parentheses) 60 minutes after
the compressor stopped, an alarm occurs.
• If the discharge gas temperature remains at or above sensor failure temperature (101°C) for 20 minutes
after the system is stopped, an alarm occurs.
* In this case, in addition to sensor failure, compressor overheating caused by insufficient refrigerant is also a
possibility.
List of discharge sensor failures
Compressor Compressor
model
Compressor 1

11. Current Protection

11-1. Fan Motor
Alarm
Occurs when the fan motor detects overcurrent, or when the
P22
fan motor is locked and does not turn.
Stop temperature (°C)
type
Inverter 106
Stop temperature (°C)
type
Inverter F04
Description
Compressor
start restriction
temperature (°C)
103
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Mini VRF SYSTEM
Control Functions
Alarm display
P03
1