5 TROUBLESHOOTING
23
Fault tree
1. Maintenance non-heating malfunction
Whether the pressure
switch is well or not
well or not
Change the control
panel
Whether the
connect is well well
heating
Reliable connection
Whether NTC is
short or open
circuit
Change NTC
Whether to set up
non-heating
Choosing new heating
temperature
Non-heating
Change the heater
Whether the heater
is well
Y
Y
Y
Y
Y
N
N
Y
N
N
