Form No. 43539049
–28–
Oct 2013
12.
TROUBLESHOOTING (PILOT MODELS 2A, 2B, 3 AND 9 ONLY)
TROUBLE
POSSIBLE CAUSE
SOLUTIONS
Pilot will not
stay lit when
lighting the
pilot…
There is air in the gas line.
The pilot orifice is clogged.
The thermocouple is defective.
The pilot safety valve is defective.
Bleed the air out or continue to ignite the brooder until
all the air is purged.
Remove and clean the orifice as necessary.
Replace the thermocouple.
Replace the gas valve.
Brooder shuts
off on pilot
safety (i.e. pilot
goes out)…
The pilot orifice is clogged.
The supply pressure is insufficient.
The thermocouple is defective.
The pilot safety valve is defective.
Remove and clean the orifice as necessary.
Check the manifold gas pressure and adjust as
necessary.
Replace the thermocouple.
Replace the gas valve.
Brooder is not
glowing red…
The supply gas pressure is too low.
The gas piping size is incorrect.
The orifice is clogged.
The orifice size is incorrect.
Check the manifold gas pressure and adjust as
necessary.
If you are not sure of the performance, use the NFPA
54 gas pipe sizing table in this manual.
Remove and clean the orifice as necessary.
See the instructions for correct orifice size and replace
if necessary.
Brooder will
not attain the
desired
temperature…
There is insufficient heat in the
building for heat loss (i.e., not
enough brooders).
The thermostat sensing bulb is
incorrectly placed.
The thermostat is out of calibration.
Conduct a heat loss and add brooders or other source
of heat as necessary.
Reposition the sensing bulb as necessary for proper
operation. NOTE: The sensing bulb should be shielded
from direct radiation to prevent short cycling of the
brooder.
Recalibrate (if possible) or replace.
12A
BURNER OPERATION TROUBLESHOOTING (DSI MODELS 5B AND 5D ONLY)
A) IGNITION MODULE DIAGNOSTICS
(DSI MODELS 5B AND 5C
ONLY)
The LED located on the ignition module (see Figure 13)
will flash ON for ¼ second, then OFF for ¼ second
during a fault condition. The pause between fault codes is
3 seconds.
LED Indication
Error Mode
Steady On
Internal Control Failure
2 Flashes
Flame Sense Fault
3 Flashes
Ignition Lockout
B) FLAME SENSOR TESTING
(DSI MODELS 5B AND 5D ONLY)
The flame current is the current that passes through the
flame from the sensor to the ground. The minimum flame
current necessary to keep the system from lockout is 0.7
microamps. To measure the flame current, connect an
analog DC microammeter to the FC- and FC+ terminals per
diagram. The meter should read 0.7 µA or higher when the
burner is running full on. If the meter reads below zero, the
meter leads are reversed. Disconnect power and reconnect
the meter leads for proper polarity.
FIGURE 13
