Download Platinum Combi installation instructions

17.0 Fault Finding
Fault Finding Solutions Sections
A
Is there 230V at:
1.
Main terminals L and N
2.
Main terminal fuse
3.
B
NO
Check electrical supply
NO
Replace fuse
NO
Check wiring
PCB - X1 connector
terminals 1,2
NO
Display
illuminated
Is there 230V at:
1.
X3 Connection Pump PCB
NO
Check incoming wiring
YES
X2 Connection Pump PCB
NO
Replace Pump PCB
YES
NO
X1 Control PCB
Check wiring
YES
X3 Control PCB, T3, T4
NO
Replace Control PCB
YES
NO
X1 Pump PCB
Replace Pump PCB
YES
Replace Pump
C
1.
YES
CH system pressure less than 0.5 bar
NO
2.
D
1.
Check the tap of the automatic air
vent is opened
Fan connections correct at fan. PCB X2 connector, is 230V AC across
terminals 3 & 4
Re-pressurise system
Check connection water pressure
switch terminal
COM - NO and PCB connector
X400 terminals 3,4
NO
YES
Fan jammed or faulty winding
Replace PCB
© Baxi Heating UK Ltd 2015
Replace water
pressure switch
Open the automatic air vent
NO
50
YES
YES
Replace fan
Replace PCB