Tjernlund SS1 SideShot with UC1 Universal Control (Version X.06) 8504102 Rev D 07/05 - Manual (Page 24)

LED FAULT INDICATORS
Fault conditions are indicated by counting the number of times LED #4 (Red) flashes.
LED #4 Flashes 2 Times
Fan Prover was in electrically closed position prior to venter operation.
LED #4 Flashes 3 Times* Fan Prover does not close within 60 seconds after call for heat.
LED #4 Flashes 4 Times* Fan Prover did not re-close after 10 minutes of Venter operation.
LED #4 Flashes 5 Times* Fan Prover opened for more than 10 seconds during burner cycle but closed within 10 minutes.
* Investigate causes of Fan Prover not making, i.e; Firing burner at capacities or temperatures exceeding Venter limits, excessive
vent pipe runs, high winds, plugged / kinked Fan Prover sensing tube or a faulty Fan Prover. Reset SS1 High Limit. If Limit was
tripped and SS1 fires, investigate cause of high heat.
CHECKING MEMORY FOR LAST FAULT CODE
IMPORTANT: Prior to accessing the fault code memory, note the settings of the dip switches so that they can be returned to their
original Pre / Post-Purge positions. When power is supplied to the UC1 use caution when moving dip switches.
The last fault code can be retrieved at any time by setting all dip switches 1-8 to the up, or “on” position. The last fault code, or
lack there of, will be indicated by counting the number of times LED 4 flashes. By moving any of the dip switches back to their
original position, the fault code will be cleared. NOTE: The UC1 board must have its 115 VAC power supply present when any of
the (1-8) dip switches are moved back to their original position for the fault code to clear.
SYMPTOM 1: SS1 OPERATES CONTINUOUSLY
Verify that Venter is not in post-purge mode which could last up to 16 minutes. A factory post-purge has been set for 2 minutes.
LED #4 & #5 (Red) will flash in unison during post-purge. A Venter pre-purge could also be set for up to 35 seconds. LED #4 &
#5 (Red) will flash alternately during pre-purge. See “Pre / Post-Purge Settings” on page 5.
Verify that LED #1 (Amber) is not lit.
Yes, LED #1 (Amber) is lit: Check interlock wiring. Confirm burner control(s) are functioning properly. UC1 control is receiving
constant call for heat signal.
LED #1 (Amber) is not lit: Replace UC1 circuit board part number 950-8804.
SYMPTOM 2: SS1 MOTOR DOES NOT OPERATE
Verify that UC1 control has power, LED #6 (Red) should be lit. Verify that LED #4 (Red) is not flashing. See “LED Status & Fault
Indicators”, page 20. Verify RED voltage selection jumper corresponds with interlock voltage (i.e 24V, 115V or “Dry”).
No: Check circuit breaker, disconnect switches and wiring. Confirm that Venter leads are connected to N & MTR terminals.
Yes, LED #6 (Red) is lit: Verify that the interlocked burner is calling for heat, LED #1 (Amber) should be lit.
No, LED #1 (Amber) is not lit: Verify interlock wiring and that thermostat/aquastat is adjusted to call for heat. Verify that the RED
voltage selection jumper is installed so that it matches the voltage of the interlocked burner.
Yes, LED #1 (Amber) is lit: Verify Prover safety circuit fault does not exist. See, “LED Status & Fault Indicators”, page 20.
If faults exist check Prover P1 & P2 safety circuit.
If no faults exist, check for 115 VAC across terminals N and MTR.
Voltage present: Confirm motor leads are securely on N and MTR. If so, replace SS1 motor part number 950-0625.
No voltage present: Replace UC1 circuit board part number 950-8804
SYMPTOM 3: SS1 OPERATES, BUT BURNER DOES NOT
Push reset button on SS1 high limit inside electrical box. NOTE: Insufficient post-purge may cause limit to trip. If the limit switch
trips, verify that the post-purge setting is long enough to remove residual heat from the combustion chamber. If high limit will not
reset and has an open circuit, replace high limit part number 950-0640. If high limit trips repeatedly, do not operate the heater until
the source of excessive heat has been determined and repaired. For any newly established call for heat the SS1 will run for 60
seconds to try to close the fan prover circuit (P1 to P2). If circuit can not be made after 60 seconds LED #4 (Red) will flash 3
times, indicating a prover check circuit fault on UC1 start up. NOTE: The UC1 safety circuit and LED #4 will be reset if the call for
heat interlock signal or 115 VAC power is removed. If the fan prover makes on start up, but breaks for more than 10 seconds dur-
ing the burner cycle, LED #4 will flash continuously indicating a prover circuit fault. The SS1 will continue to run for 10 minutes to
try to make the prover circuit as long as a call for heat exists. If Prover is not made within 10 minutes, the SS1 will shut down and
LED #4 will flash 4 times indicating a prover circuit fault. Remove the call for heat and then reestablish to reset the UC1 prover
safety circuit (P1 to P2) & LED #4.
Verify that LED #2 (Blue) is lit.
Yes, LED #2 (Blue) is lit: Verify that "call jumper" is connected from J1 to J2 on UC1 circuit board if using typical wiring where sup-
ply voltage from terminal 1 is routed to terminal 3 through “call jumper” then to 4 when appliance interlock relay makes. With call
for heat established, verify that wiring is correct by measuring voltage between terminals 1 & 2 and 2 & 4 of UC1 terminal strip.
IMPORTANT: Fault codes will automatically be displayed after a fault condition occurs. If the call for heat interlock sig-
nal or 115 VAC power is removed, the UC1 board will reset and the fault will be stored in memory instead of displayed.
Any new fault will replace any previous fault.
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