Reznor ULSA 035(EC) - Page 26

1701ULSA(EC)--EN, p. 26/30
Check if the
igniter
sparks!
Check
presence of
flame!
Check if flame is
maintained and unit
goes past the
stabilisation time!
YES YES
N
O
YES
Check if tube
between pressure
switch and copper
pipe is intact
N
O
Call for hea
t
YES
N
O
N
O
Check if the
copper pipe is
not bent or
obstructed!
YES
Re
p
lace rubber tube!
Unclog and blow dry!
Check if the
pressure switch
works within its
parameters!
YES
Re
p
lace Pressure switch!
N
O
Check copper
pipe inside the
unit is not
clogged!
Replace copper tube!
Check if the
cooling fan
works within set
parameters!
N
O
Replace cooling fan!
N
O
Check if the
igniter
sparks!
Check
presence of
flame!
Check if the
condensation
siphon is full of
water!
YES YES
N
O
Check if
condensate flows
from the unit to
the siphon!
N
OYES
Fill with water and restart!
Call for hea
t
N
O
Check if the drainage
pipes from the unit to
the siphon and to the
main pipe are clogged!
YES
Remove and clean all parts
including the nipple
between the flue gas blower
and the collector box!