Steffes 612EXT Troubleshooting Guide - Manual (Page 3)

MODEL: EXT
FUNCTION: Core Charging
PROBLEM: Unit Charges Improperly
Place heat storage switch in the "On" position. Place charge level switch in the "Low/Auto" position. Turn thermostat
all the way down (counter clockwise) to the low stop position. Energize heater, ensure that proper line voltage is present
at L1 to L2 and F1 to F3. Remove the wiring from the charging disks and put jumpers in their place (white to gray,
orange to gray, and yellow to gray). Jumper the blue and blue/white peak control wires.
IS THE AMBER
CHARGING
LIGHT ON?
Check voltage
at T1 to T2.
Remove the jumper
between the white
and gray wire.
Does the charging
light turn off?
Check voltage at
T2 to L2.
Check voltage at
L2 to T1.
Check unit wiring.
Place the charge level switch in the "Med" position. Does the
charging light turn on?
Remove the jumper between the yellow and gray wire. Does the
charging light turn off?
Place the charge level switch in the "High" position. Does the
charging light turn on?
Remove the jumpter between the orange and gray wire. Does the
charging light turn off?
Turn up the room thermostat. Does the charging light stay off?
Change charging
disks(61,62,63).
Check voltage at
L2 to T1.
Is heater hot?
No Line
Voltage
Yes
Yes
Yes
Yes
Line Voltage
Fix unit
wiring.
Replace circuit
board (29).
Incorrect
Replace linear
high limit (33).
Yes
No Yes
Correct
No Line
Voltage
No Line Voltage
No
No
No
No
Check the ohm value
of the elements(54).
Yes
Line
Voltage
Line
Voltage
No
No Line Voltage
No
Line Voltage
Yes
No
Change elements (54).
NOTE: If elements are open, change the charging disks (61,62,63) as well.
Incorrect
Correct
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