Diagnostic Led’s - STA-RITE Sr200na, Sr200lp,, Sr333na, Sr333lp,, Sr400na, Sr400lp Owner's Manual

Diagnostic LED's: AGS, AFS, HLS, PS, THERMISTOR
AGS or HLS "on"
Replace High Limit
Switch (HLS) or
Automatic Gas
Shutoff (AGS)
CONTINUE
If problem persists, verify proper operation of Internal Bypass Valve
and Thermal Governor, and check for Heat Exchanger blockage.
PS "on"
Verify that wiring is
OK and pressure tap
is not blocked. Re-
place Pressure Switch
AFS "on"
Replace Blower.
Verify that wires BM
and F1 are correctly
connected at the
terminal strip (see
Heater Connection
Diagram, Page 36).
YES
Disconnect wires F1
and F2 from Ignition
Control Module and
short them together.
Does Blower come
on?
YES
THERMISTOR "on"
Do not jumper a safety switch to
remedy a failed switch.
Verify that water flow rate is
above minimum required for
heater.
YES
Verify that inlet water temper-
ature is below 104° F.
Verify that water flow rate is
above minimum required for
heater.
CONTINUE
Adjust Water Pressure Switch to close with pump running and open with
pump off.
Does Blower operate?
YES Check for 120 VAC at Blower
connector on ignition try.
Check for 24 VAC between
YES
24 VAC and GND terminals
on Ignition Control Module on
ignition try. Check that IND
wire is correctly connected.
NO
Verify correct connection of
wiring between 24 VAC and
IND terminals on Ignition
Control Module and Control
Board, and replace Control
Board.
Connect correctly and retry.
Does Blower start?
NO
Replace Blower. Does Blower
NO
Start?
NO
Verify Thermistor wiring. If
OK, replace Thermistor.
NO
YES
NO
NO
YES
YES
NO
NO
NO
NOTE: ES1 is a spare and should be jumpered.
28
Service pump and filter to
restore proper flow. After ser-
vicing, verify proper operation
of Pressure Switch (PS).
Replace thermistor or Control
Board to correct overheating.
Service pump and filter to
restore proper flow.
CONTINUE
Verify that there is no block-
age in Blower intake, Heat
Exchanger, and exhaust and
that exhaust is not too long
(see "Indoor Vent Installation",
Page 15.
Verify correct connection of
wiring and that pressure taps
to AFS are OK.
Verify that vinyl tubing to AFS
and Blower is not misrouted,
kinked, disconnected, or
punctured.
Replace Air Flow Switch
(AFS).
If problem persists, replace
Blower.
YES
Replace Ignition Control
Module.