PVI Industries B40 User Manual

 

TROUBLESHOOTING SUGGESTIONS 

 

1.  BURNER FAILS TO START: 
 

A.  Defective on/off or fuel transfer switch. 

Replace switch. 

 
B.  Control circuit has an open control contact. 

Check limits, low water cutoff, proof of closure 
switch and others as applicable. 

 
C.  Bad fuse or switch open on incoming power 

source. Correct as required. 

 
D.  Motor overloads tripped. Reset and correct 

cause for trip out. 

 

E.  Flame safeguard control safety switch 

tripped out. Reset and determine cause of 
apparent flame failure. 

 
F.  Loose connections or faulty wiring. Tighten 

all terminal screws and consult wiring diagram 
furnished with the burner. 

 

G.  Frozen oil pump shaft preventing blower 

motor operation. Replace oil pump. 

 
H.  Flame safeguard control starting circuit 

blocked due to flame relay being energized. 
Possible defective scanner or photocell  - 
replace. Possible defective amplifier  - replace. 
Scanner actually sighting flame due to leaking 
fuel valve  - correct unwanted flame cause. 
Defective flame safeguard control - replace. 

 
I. 

Defective blower motor. Repair or replace. 

 
 
2.  OCCASIONAL LOCKOUTS FOR NO 

APPARENT REASON: 

 

A.  Check for proper settings on direct spark oil 

ignition electrodes. Make certain that gap is 
not too wide and the “light-off” oil pressure is as 
recommended. 

 

B.  Direct spark ignition. Verify that there are no 

cracks in the porcelain and that transformer end 
and electrode end plug-in connections are tight. 

 

C.  Loose or broken wires. Check all wire nut 

connections and tighten all terminal screw 
connections in panel and elsewhere as 
appropriate. 

 

D.  Occasional low supply voltage. Contact local 

utility to correct. Make certain the burner control 
circuit transformer (if supplied) is correct for the 
voltage and power (VAC) being supplied. 

 

 
3.  BURNER MOTOR RUNS, BUT DIRECT SPARK 

IGNITED OIL FLAME IS NOT ESTABLISHED: 

 

A.  Defective or incorrect size oil nozzle. 

Remove and clean or replace. 

 
B.  Low oil pressure. Check with gauge for correct 

“light-off” pressure. 

 
C.  Defective oil pump. Replace. 
 
D.  Defective oil solenoid valve. Replace. 
 
E.  Oil pump coupling loose and defective. 

Replace or tighten as required. 

 
F.  Low oil pressure switch (if supplied) 

defective or incorrectly set. Adjust or replace 
switch. 

 
G.  Ignition transformer defective. Replace. 
 
H.  Ignition electrode set incorrectly. Remove 

electrodes and reset. 

 
I. 

Ignition electrodes cracked and grounding 
out spark. Replace electrodes. 

 
J.  Ignition leadwire defective and grounding 

out spark. Replace. 

 

K.  Ignition plug in connections at transformer 

or electrode loose. Tighten. 

 

L.  Air flow switch not making circuit. Adjust set 

point or replace. 

 
M.  Defective flame safeguard control or plug in 

purge timer card. Replace. 

 

N.  Air dampers held in high fire position due to 

mechanical binding of linkage. Readjust 
linkage. 

 
O.  Loose wiring connections. Check and tighten 

all connections.