State Industries ROOFTOP SRT80 120NE - Manual (Page 22)

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The following are fault conditions related to the ignition module:
Fault: I.M. LOCK OUT
I.M Failed an internal hardware or software check
Possible Cause Remedy
1. Ignition Module Failure 1. Replace Ignition Module
Fault: I.M. PS CLOSED
The pressure switch is stuck closed
Possible Cause Remedy
1. Pressure switch is shorted 1. Check and replace wiring
or not wired properly
2. Defective pressure switch 2. Replace pressure switch
Fault: I.M. PS OPEN
The pressure switch is stuck open
Possible Cause Remedy
1. Pressure switch is not 1. Check that the pressure
connected switched is wired properly
2. Pressure switch is open or 2. Check and repair wiring
not wired properly
3. Defective pressure switch 3. Replace pressure switch
4. Insufficient pressure 4. Verify blower operation
developed by combustion to the ignition module
blower
Fault: I.M. ECO
Emergency cut-off, water temperature has reached an unsafe
temperature
Possible Cause Remedy
1. Temperature probe is 1. Check that the temperature
damaged probe is not damaged and
replace probe if necessary
2. Temperature probe wiring 2. Check and repair wiring
is damaged
3. Water in tank too hot 3. Normal condition when
water temperature exceeds
safety limit. Allow water
to cool or admit water into
tank and manually reset the
control. Determine cause
for over temp condition
Fault: I.M. 115V REVERSED
The line hot and the neutral line are reversed wired
Possible Cause Remedy
1. Line hot and neutral 1. Check wiring and reverse
reversed line hot and neutral
Fault: I.M. LOW FLAME
Low flame has been sensed
Possible Cause Remedy
1. Weak or insufficient flame 1. Check flame rod
detected
Fault: I.M. IGNITER
There is a problem with the ignition module
Possible Cause Remedy
1. Igniter is not wired in or 1. Check that the igniter is
the wiring is damaged wired in properly or that
the wiring is not damaged
2. Igniter is damaged 2. Replace igniter
3. The ignition module is 3. Replace ignition module
damaged
Fault: I.M. FLAME FAULT
A flame was detected when there is not supposed to be a flame
(no call for heat).
Possible Cause Remedy
1. Flame sense wiring is 1. Check and repair wiring
damaged
2. Ignition module is 2. Replace ignition module
damaged
PRIOR TO START UP
REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES
ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN
THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS
SUPPLY AND ELECTRICAL WORK ARE REQUIRED.
Before attempting start-up, thoroughly study and familiarize yourself
with the exact sequence of operation and all other details on the
specific heater being used.
The power burner is equipped with an ignition system which
automatically sequences prepurge and ignition, senses and
ignites main burner flame and sequences burner operation. Heater
is equipped with an ignition control which locks out after three
unsuccessful ignition attempts. Familiarize yourself with the
sequence of operation of this unit prior to start-up.
Be certain that the water heater is full of water, that air is purged
from all lines, there are no leaks (gas and water), and all inlet
water lines are open.
The following test equipment should be on hand (all test equipment
must be acclimated to ambient temperature before calibration and
use.)
– Two U-tube manometers or calibration 0-10" (0-2.5 kPa) and
0-35" (0-2.5 kPa) W.C. pressure gauges.
• Attach a gas pressure gauge or manometer to the upstream
side of main gas cock and a gas pressure gauge or manometer
to the manifold pressure tap.
• You are now ready to begin the burner start-up procedure.