Description of functioning
t e c h n i c a l
45
4A
4B
PUMP DOESN´T WORK
FAN DOESN´T WORK
IN
Yes
Yes
OUT
Is the pump ON?
There are 230 Vac in J17
Unseize up the pum or
replace the paump
No
No
IN
No
Yes
OUT
Check if the air pressure
switch is correct, are the
contact opened?
(black wires)
Are these contacts
closed?
(black wires)
Check wiring and
conections, if it is OK,
replace the main control
circuit
Replace air pressure
switch connections or
pressure switch
Yes
There are 230 Vac in J18?
(wires blue-brown)
No
Check wiring and
connections, if it is OK,
replace the main control
circuit
Unseize the pump impelor or
replace the pump
39
Check the connections
at the PCB if all OK then
replace the main PCB
Are the contacts in the
the air pressure switch
open ?
Replace the air pressure
switch
YES
