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.
PRE / POST PURGE AND PROVER STATUS CHECK DIP SWITCH SETTINGS
IMPORTANT:
UC1 Fault codes will automatically be displayed after a fault condition occurs. If the call for heat interlock
signal 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.
9
ON
PRE-PURGE SETTINGS
(SEE “PRE-PURGE” ON PAGE 3 PRIOR TO SETTING)
0 Seconds
15 Seconds
30 Seconds
60 Seconds
1 2
1 2
1 2
1 2
0 Seconds
5 Seconds
20 Seconds
35 Seconds
P1 & P2 PRE-CYCLE FAN PROVER STATUS CHECK
Pre-Cycle
Prover Status
Check Deactivated
The UC1 Pre-Cycle Prover Status Check is deactivated from the factory to avoid nuisance
lockouts in applications where exhaust shafts or vents may be capable of creating enough
chimney effect to make the pressure set point prior to a call for heat. When activated, the UC1
Universal Control checks across the P1 & P2 safety circuit Fan Prover to verify that the Fan
Prover switch is “Open” upon a call for heat and not stuck “Closed”. Keeping the Prover Status
Check activated may cause nuisance lockouts. Push up or “ON” to deactivate.
9
Pre-Purge
Post-Purge
Pre-Cycle
Prover Status
Check Deactivated
DIP SWITCH NUMBERING
1
ON
2
3 4
5 6
7 8
9
POST-PURGE SETTINGS
(SEE “POST-PURGE” ABOVE PRIOR TO SETTING)
4
3
4
8
6
5
7
3
5 6 7 8
3 4 5 6 7 8
3
7
5
4
6
8
4
3
4
8
6
5
7
3
5 6 7 8
3 4 5 6 7 8
4 Minutes
8 Minutes
16 Minutes
1 Minute
0 Seconds
30 Seconds
2 Minutes
ON
ON
1 9
LED 1 AMBER
LED 2 BLUE
LED 3 GREEN
LED 4 RED
LED 5 RED
LED 6 RED
POWER LED
ON