Tjernlund SS1C SideShot with UC1 Universal Control (Version X.02) 8504103 Rev 07/02 - Manual (Page 20)

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TROUBLESHOOTING ELECTRICAL PROBLEMS
The following guide is intended to be used if a problem occurs during the use of the SS1C side wall vent system. It may be
necessary to measure voltage during troubleshooting.
Extreme caution must be exercised to prevent injury. If you are unable to determine the defective part with the use of this
guide, call your Tjernlund distributor or Tjernlund Products direct at 1-800-255-4208 for further assistance.
IMPORTANT: To reset faults, verify fault by checking the LEDs and then remove call for heat.
LED STATUS & FAULT INDICATORS
LED INDICATOR LIGHTS
LED #1 (Amber) Appliance call for heat.
LED #2 (Green) Safety circuit through P1 & P2 (SS1C Limit & Fan Prover) is verified “Open” upon start-up. Burner circuit is
energized with contact closure from terminal 3 to 4. Also verifies SS1C prover & limit are closed during run cycle.
LED #3 (Green) Power switched to SS1C Motor from L to MTR & M.
LED #4 (Red)
Status indicator.
LED #5 (Red) 115 VAC power supplied to board. Also used as status indicator.
LED INDICATOR LIGHT STATUS & FAULTS
LED #4 & #5 Flashing Alternately
= Prover start up fault. SS1C Prover contacts “Closed” across P1 & P2 upon appliance call
before SS1C is turned on. Prover status check must be activated, see page 5.
LED #4 & #5 Flashing in Unison = Fan Prover circuit is “Open” longer than 60 seconds on start-up or 10 seconds during run
cycle. Prover or Limit contacts are not staying “Closed” across P1 & P2 safety circuit.
LED #4 Flashing & #5 on Continuous = System in Pre-Purge. (Pre-Purge options 0, 15, 30, 60 seconds)
LED #5 Flashing & #4 on Continuous = System in Post-Purge. (Post-Purge options 0, 30 seconds or 1, 2, 4, 8, 16 minutes)
SYMPTOM 1: SS1C 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 (Red) will be on continuously and LED #5 will be flashing during post-purge. A Venter pre-purge could also be set for up
to 1 minute. LED #4 (Red) will be flashing and LED #5 will be on continuously during a Venter 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. UC1 control is receiving constant call for heat signal.
LED #1 (Amber) is not lit: Replace UC1 circuit board part number 950-8801.
SYMPTOM 2: SS1C MOTOR DOES NOT OPERATE
Verify that UC1 control has power, LED #5 (Red) should be lit.
No: Check circuit breaker, disconnect switches and wiring.
Yes, LED #5 (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 indicator light status & faults, above.
If faults exist check Prover P1 & P2 safety circuit.
If no faults exist, check for 115 VAC across terminals N and MTR.
Voltage present: Replace SS1C motor part number 950-0625.
No voltage present: Replace UC1 circuit board part number 950-8801.