Relay Adhesion Error (Ptac) - Toyotomi KURO Mini Service Manual

12.2 Relay adhesion error (PTAC)

Main check points:
(1) wiring diagram (2) main board
Start
Check if the wiring
connection and insertion
is normal
N
Connect and insert wiring again
according to the wiring diagram
Replace with a new
controllerwith the same
model
End
Energization test
Y
Eliminate
malfunction
N
Energization test
Y
Eliminate
N
malfunction
Y