A.O. Smith TWI 35-130, Installation, User And Service Manual

Page: 47 / 64

Instruction manual TWI 35-130 G/TWI 45-190 G 47
Instruction manual -
TWI 35-130 G/TWI 45-190 G
47
Pannes s’affichant sur la commande
Light pulses
Cause
Solution
Remark
3 (SL3)
Three ignition attempts without success
No gas supply
1.
Open the mai
ns gas supply va
lve and/or the manual gas valve
for the gas control.
2.
Check the pre-pressure on the
gas control.
3.
If necessary
, restore the gas supply
.
Contact your installation engineer for restoring the gas supply
.
Air in the gas pipe
Bleed the gas pipe.
Contact your installation engineer for replacing the required parts.
No gas supply to burner
1.
Check if the gas valve switche
s.
2.
Replace the g
as control if nece
ssary
.
Error in the hot surface igniter circuit
1.
Check if the hot surface igniter has been properly connected. See
(12.2 “Electrical circuit diagram”)
.
2.
Check the cabling of the hot surface igniter
.
3.
Check the voltage over the hot surface igniter
. This should be
115 V
AC.
4.
Measure the resistance over th
e hot surface igniter
. This
should be between 45 and 400 Ohms.
5.
Replace the h
ot surface igniter
if necessary
.
Contact the installation engineer in case of reoccurring errors. Contact the installation engineer for replacing the required parts.
Phase and Zero incorrectly connected
Correctly connect the Phase and the Zero
(3.9 “Electrical
connection”)
. The device is phase-sensitive.
Error in the ionisation circuit
1.
Check if the hot surface igniter has been properly connected. See
(12.2 “Electrical circuit diagram”)
.
2.
Check the cabling of the hot surface igniter
.
3.
Check if the ground wire of the
burner has been properly
connected.
4.
Replace the h
ot surface igniter
if necessary
.
Supply voltage too low
Check the supply voltage.
This should be 230V
AC (-15% +10%).