P3- Fluoride Deficiency Protection - Toyotomi KURO Mini Service Manual

P3- Fluoride deficiency protection

Error
phenomenon
Frequent
problematic part
Inspection
procedure and
key points
Error code
LED light signal of
external panel
1. System lack of fluoride
2. The valve is not open
3. Capillary blockage
4. Internal and external coil temperature sensation abnormally
5. Four-way valve channeling gas
6. Compressor is not started, such as compressor capacitor damage,
compressor damage, compressor overheating protection (specific to
constant frequency)
When P3 is displayed in the inner machine or "off and flash off" is
displayed on the outer machine board, the fault code is "26" through
the after-sales tooling query, indicating the " Fluoride deficiency
protection " fault is reported in the air conditioner.
Check the cause of error as follows:
1. Check the refrigeration effect of the air conditioner. If the
refrigeration effect is good and the connecting pipes are cool enough,
check whether the internal coil sensor falls off or is damaged by
temperature drift, or directly replace the internal main control board; If
the refrigeration effect is not good, big and small pipe is not cool,
according to the next step operation.
2. Check whether the stop valve is open. If not, open the stop valve.
Otherwise, according to the next step operation.
3. (constant frequency) check whether the compressor is started or not.
If it is not started, check the capacitor of the compressor, the resistance
value of the compressor and whether it is protected from overheating.
Otherwise, according to the next step operation.
4. Check system pressure. If the pressure is low, it may be caused by
fluorine deficiency and Capillary blockage; if the pressure is high, it
may be caused by four-way valve channeling gas.
P3
LED1
LED2
LED3
Off
Flash
Off