P2-High Voltage Switch Protection（Pe: High Voltage Switch Error） - Toyotomi KURO Mini Service Manual

P2-High voltage switch protection（PE: High voltage switch error）
Error
phenomenon
Explanation of
error
Tools required
for inspection
Frequent
problematic part
Inspection
procedure and
key points
Special attention
Error code
LED light signal of
external panel
Cause: In the standby state or when the unit is running, the
high-voltage switch is open, reaching 3 times (within 20 minutes), and
it will report "high-voltage switch protection";
Inspection path: Low voltage switch cable → Connector → Low
voltage switch→Main control board
Multimeter, Cable, Low voltage switch
Low voltage switch cable, Unit lack of fluoride, Low voltage switch
1. Check whether the plug-in terminal is firmly connected, and whether
the terminal and the main control board are soldered loosely. If
necessary, pull it slightly to check it;
2. Use a multimeter to measure whether the cable is disconnected;
3. Use a multimeter to check the status of the low-voltage switch,
whether it is in the off state (normally closed, abnormally
disconnected).
4. Check whether the unit pressure is normal. When the pressure is
normal after adding fluoride, repeat the third point verification.
5. If the pressure is normal, the low-voltage switch remains open, and
it can be determined that the pressure switch is faulty;
6. If the pressure switch is normal, the connection line is also no
problem, and the fault is reported, and replace the corresponding main
control board.
The reason why the low-voltage switch is often disconnected is that the
unit leaks. When the low-voltage switch is turned off, first check
whether the unit pressure is normal. If the unit status is normal, if the
error is reported after replacing the external main control board, the
connection tube may be too long and the outer ring temperature is too
low.
P2
PE
LED1
LED2
LED3
Off
Light
Light