User Manual

Three Times Indicates ignition
failure.The ignition control is in safety lockout..
Is proper fuel
supplied to heater
inlet?
Connect proper
gas supply to
heater. Open all
gas shutoff valves.
Is proper gas
pressure supplied
to heater?
Provide proper gas supply
pressure to heater. Refer to
dataplate. If LP gas is used,
ensure LP container is full.
Is backflash
switch tripped?
Check
continuity.
Is Ignitor
properly
gapped?
Is proper
voltage
supplied to
gas valve?
Defective gas
valve.
Check igniter gap
Regap to 3/16 in.
Defective wires or
connections. If good,
replace ignition control.
Does ignitor
spark?
Is igniter high voltage
lead securely
connected?
Reposition
Igniter.
(See Service
Instructions)
Connect high
voltage lead
21
Five Times
If control module does not reset, then replace it (Internal board fault.) If module resets, then have qualified electrician check power source for power quality problems. (Frequency, line noise, line spikes, loose connections, too small wire gauge.)
Flame sense related problems. Check for cracked or dirty flame sensor, improperly positioned sensor, or poor flame sense ground.
Four Times
Rapid On/Off cycling of the burner.
Does gas
solenoid valve open?
TRADESMAN ULTRA HEATER
Problem
Is the heater
properly
grounded?
No
Ensure all
grounds are
connected.
Determine if ignitor receives high voltage: -- Disconnect ignition lead from ignition control. -- Position a screwdriver tip about 3/16 inch away
from ignition control where lead was connected .
-- WITH GAS OFF, start the heater. -- If no spark is seen, replace the igntion control. -- If spark is seen, reconnect igntion lead to control. -- Disconnect the lead at the ignitor. -- Hold the lead about 3/16 in. from a grounded
section of the heater.
-- WITH GAS OFF, start the heater. -- If no spark is observed, replace the ignition lead. -- If spark is observed, replace the ignitor.
Is ignitor gap
positioned
toward burner
orifice?
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check continuity across
switch. If contacts are
open determine cause.
Check for:
proper voltage, blockages
at air inlets or outlet, loose
fan, or low fan speed.
If good, repalce backflash
switch.
Yes
Check the burner orifice
for blockage. Clean or
replace the orifice .