Discharge Gas Temperature; Current Protection - Panasonic R410A Service Manual

10. Discharge Gas Temperature

11. Current Protection

10-1. Discharge Gas Temperature Protection
Alarm
The compressor upper-limit discharge temperature is 222°F. If the discharge temperature reaches 222°F, then
the compressor stops. If the discharge temperature reaches 222°F 4 times repeatedly after restart, an alarm
occurs. After the compressor stops, if the discharge temperature at the stopped compressor is at or above 213°F,
the compressor start restriction temperature, then this compressor does not operate until the temperature drops.
List of discharge temperature protections
Compressor
model
Compressor 1
10-2. Control For Detection of Discharge Sensor Failures
• If the temperature is at or above sensor failure temperature (176°F) (value in parentheses) 60 minutes after
the compressor stopped, an alarm occurs.
1
• If the discharge gas temperature remains at or above sensor failure temperature (213°F) 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
2
Compressor
model
Compressor 1
3

11. Current Protection

11-1. Fan Motor
4
Alarm
P22
5
6
Compressor
Stop temperature (°F)
type
Inverter 222
Compressor
Alarm display
type
Inverter F04
Description
Occurs when the fan motor detects overcurrent, or when the
fan motor is locked and does not turn.
Compressor
start restriction
temperature (°F)
213
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Mini VRF SYSTEM
Control Functions
Alarm display
P03