Thomas & Betts LDAP 1200 - Manual (Page 40)

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 40
FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:
FIRST: Contact the Installer
Name __________________________________________________________
Address_________________________________________________________
__________________________________________________________
__________________________________________________________
Phone _____________________________________
SECOND: Contact the nearest distributor (See Yellow Pages). If no listing,
contact Authorized Factory Representative, 1-800-695-1901 (Press 1).
THIRD: Contact REZNOR ® / Thomas & Betts Corporation
150 McKinley Avenue
Mercer, PA 16137
Phone: (724) 662-4400
Model No. _________________________________
Heater Serial No._____________________________
Date of Installation ___________________________
(800) 695-1901; www.RezSpec.com
©2005 Thomas & Betts Corporation, All rights reserved.
MANUFACTURER OF HEATING, COOLING, AND VENTILATING SYSTEMS
Trademark Note: Reznor ® and T CORE 2® are trademarks of Thomas & Betts.
9/05 Form RZ-NA I-LDAP (Version .2)
General Troubleshooting (cont’d)
PROBLEM (cont'd) PROBABLE CAUSE (cont'd) REMEDY (cont'd)
1. Gas pressure too high or too low. 1. Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14"
w.c. for propane gas.
2. Burner not grounded 2. Make certain integrated circuit board is grounded to ignitor.
3. Circuit board not grounded. 3. Make certain integrated circuit board is grounded to furnace chassis.
4. Faulty integrated circuit board 4. If 24 volt is available to the integrated circuit board and all other
causes have been eliminated, replace board.
5.
a) Make sure unit is properly vented.
b) Remove obstructions from vent.
c) Replace faulty tubing to pressure switch.
6. Faulty combustion air proving switch. 6. Replace combustion air proving switch.
7. Flame sensor grounded. 7. Be certain flame sensor lead is not grounded or insulation or ceramic
is not cracked. Replace as required.
8. Cracked ceramic at sensor. 8. Replace sensor.
9. Incorrect polarity. 9. Reverse line volt leads to integrated circuit board.
1. Incorrect valve outlet pressure or orifice. 1. Check valve outlet pressure. See Rating plate for manifold pressure.
2. Cycling on limit control. 2. Check air throughput.
3. Improper thermostat location or adjustment. 3. See thermostat manufacturer's instructions.
1. Circuit open. 1. Check wiring and connections.
2. Defective integrated circuit board. 2. Replace board.
3. Defective motor. 3. Replace motor.
Fan or venter motor turns
on and off while burner is
operating 1. Motor overload device cycling on and off. 1. Check motor load against motor rating plate. Replace motor if needed.
1. Low or high voltage supply. 1. Correct electric supply.
2. Defective motor. 2. Replace motor.
3. Poor airflow. 3. Clean motor, fan, fan guard, filter, and coils.
4. Defective bearing or lubrication. 4. Lubricate bearings (motor permitting) or replace motor.
Fan or venter motor will
not run
Fan or venter motor cuts
out on overload
Burner cycle on and off
5. Combustion air proving switch(es) not
closing.
No heat (Heater
Operating)