State Industries STC-074 specifications Flash Codes of Diagnostic Indicator, Test 2 Polarity Check

SBN TANK TYPE COMMERCIAL GAS WATER HEATER

SERVICE HANDBOOK

FLASH CODES OF DIAGNOSTIC INDICATOR

Conditions:

ƒPower On

ƒRed, heater control “Call for Heat” LED – on

ƒRed, ignition control board diagnostic LED – Flashing

ƒNote LED Flash Code before resetting heater.

LED Status		Indication
1	Flash	System is in lock out.
2	Flashes	Draft proving (pressure) switch failed to open within 5 seconds at the end of the last cycle.
3	Flashes	Draft proving (pressure) switch failed to close ( -2.1 inches of water column pressure) within 5
		seconds after the inducer was started.
		The low gas pressure switch )closes at 5.2" ± .04" w.c.) may have remained open.
4	Flashes	Open on high temperature limit switch (ECO).
6	Flashes	115-volt supply power connection is indicating reversed polarity.
7	Flashes	Flame sensor reads a low flame signal for more than 4.25 sec.
8	Flashes	No ignition sensed.
Continuous Flash		Continuous flame sensed for more than 5 seconds without gas valve being energized.
Continuous ON		Internal control board failure.

*Control system self adjusts to use a minimum voltage for ignition. Lower voltage results in lower igniter temperature which results in longer igniter life. Igniter voltage may vary from Nominal 80 VAC.

TEST 2 - POLARITY CHECK

Conditions:
ƒ No hot water	Display
ƒ Green “Power” LED is on.
ƒ Tank is more than 5° F
below temperature dial
setting.
ƒ Red ignition control board
diagnostic LED is flashing
6 times between pauses.
ƒ Red, diagnostic “Call for
Heat” LED-OFF.

LED’s

Continued on next page

Technical Training Department 27 ©2003

Ashland City, Tennessee