Panasonic U-8MF2E8 Service Manual page 143

4. 3WAY Alarm Codes
L17 Alarm
Alarm code L17
Alarm meaning Outdoor unit model mismatch
Alarm conditions This alarm occurs when a unit other than R410A refrigerant model is connected.
Probable cause (1) A unit that uses R407C refrigerant, or a R22 model unit, was connected by mistake.
(2) The connected unit is correct, however the refrigerant type setting in the outdoor unit
EEPROM (item code 80) is incorrect.
Check (1) Check the refrigerant type at the connected unit.
(2) Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant type.
If the setting is incorrect, change it to R410A.
Correction —
Example —
Notes The outdoor unit's maintenance remote controller is required in order to set the refrigerant type in
the outdoor unit EEPROM.
P02 Alarm
Alarm code P02
Alarm meaning Compressor thermal protector is activated. (trip only and no alarm)
When the current is not detected over 4 seconds long after the compressor ON.
Alarm conditions
Probable cause Activating condition of the compressor thermal protector (The voltage is more than 260V or less than
160V between L and N phase.)
Check (1) Check the constant speed compressor.
(2) Check the current transformer.
Put the constant speed compressor OFF over 60 minutes and cool the thermostat.
Correction
Replace defective parts with new ones.
Example —
Notes —
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3WAY SYSTEM
Trouble Diagnosis
5