Addison B Installatie-, Bedienings- en Onderhoudshandleiding - Pagina 18
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TROUBLE SHOOTING GUIDES CONTINUED
Electronic-Regulator Continued
SYMPTOM
1. Heat load requires low fire only.
2. Plunger and/or maximum spring
missing.
G. Continuous low or medium
3. Jammed plunger.
fire, but automatic valve cycles
correctly.
4. Other valves faults.
5. Inadequate supply pressure.
1. Calibration.
H. Incorrect discharge air
temperature.
1. Dirty or sticking plunger.
2. Loose or broken wiring.
I. Erratic or severely pulsating
3. Erratic voltage.
flame.
*Control circuits external to the Electronic-Regulator and Amplifier can cause burner malfunction. Always check gas valve to be certain it is turned on, and check limit controls for normal operation.
POSSIBLE CAUSE
1. Increase temperature setting 10 degrees.
2. Check for parts.
3. Examine. Plunger should be clean, smooth, and operate freely in solenoid
sleeve.
4. Remove wire from MR valve.
5. Remove max. adjustment spring from MR valve, push down on plunger.
Insufficient manifold pressure with furnace operating indicates supply is too
low.
1. Check seal on calibration potentiometer.
1. Examine. Plunger should be clean, smooth, and operate freely in solenoid
sleeve.
2. Inspect wiring.
3. Observe DC voltage across amplifier terminals 1 and 2.
FIELD TEST
REMEDY
1. If heater goes to high fire, system is working
correctly.
2. Install correct parts.
3. Clean, or replace plunger if necessary.
4. If MR valve remains on low fire, valve may be
faulty.
5. Check for obstruction in gas pipe ahead of
controls. Increase gas pressure if possible.
1. Recalibrate per "Temperature Calibration"
procedure.
1. Clean or replace plunger if necessary.
2. Correct wiring.
3. If erratic or pulsating DC voltage is observed and
wiring shows no defects, replace amplifier. If erratic
or pulsating voltage continues, contact Addison.
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