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UH68ODK Tent Heater
4-1
Chapter 4
Troubleshooting
General
This section contains information for locating and correcting most operating problems. This
manual can not list all that may occur. When performing trouble shooting procedures, follow
all warnings and safety procedures. At no time does this manual supercede good common
sense.
Sequence of Operation
1. Move main switch to HEAT. The green standby LED should illuminate
2. Rotate the room thermo to the nine o'clock position or until the green HEAT LED
illuminates.
3. After a five second delay the burner system will come on. This includes the ignition
transformer, fuel pump, fuel solenoid, and combustion blower.
4. The vent fan will come on when the heat exchanger comes up to temperature and
the flame switch closes. The amount of time will vary (30 to 120 seconds) depending
on the ambient temperature.
5. Once the vent fan comes on the heater will continue to operate until the call for heat
from the room thermo is satisfied or the main switch is turned off. If the airflow is
reduced due to very high back pressure, the burner will cycle off from time to time.
This is normal.
Blink Code Troubleshooting
Blinks Para. Problem / Remedy
1
Low voltage at AC input (< 100 VAC)
Check power supply or generator. If using an extension cord, make sure the wire is
heavy enough.
2
Reverse polarity at AC input
Check power supply or generator. If using an extension cord check connections.
3
High voltage (>130 VAC)
Check power supply or generator
4
Not used
5
PC Board over temp
6
Not used
7
Not used
8
1.1
1.2
1.3
1.4
1.5
1.6
Ignition Fault Lockout
Check fuel supply, refill if necessary.
Check Flame switch.
Check fuel pump
Check fuel flow at carburetor
Check Ignition transformer
Check Overheat thermo