Instruction/ maintenance manual of the product 50A55 Emerson
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www.white-rodgers.com 259 TECHNICAL HELP TECHNICAL HELP INTEGRA TED FURNA CE CONTROL MODULE TROUBLESHOO TING GUIDE 50A55 INTEGRA TED FURNACE CONTR OL MODULE Qualied Serviceman’s T roubleshooting Guide TROUBLESHOO TING PROCEDURE If the light on the module is on continuously , the fault is likely to be internal to the module.
www.white-rodgers.com 260 TECHNICAL HELP Place thermostat fan s witch in the ON position. Return fan switch to A UTO position. Indoor Blower Check Does indoor blow er run at HEA T speed? YES YES NO NO YES NO YES NO YES NO Indoor blower fault. Repair or replace.
www.white-rodgers.com 261 TECHNICAL HELP INTEGRA TED FURNA CE CONTROL MODULE TROUBLESHOO TING GUIDE Place thermostat system switch in cooling mode and fan switch in A UTO position. Lower temperature selection lev er to call for a cooling cycle. R & Y contacts close.
www.white-rodgers.com 262 TECHNICAL HELP Inducer Draft Motor and Pressure Switch Check Is induced draft motor energized? YES YES NO Is diagnostic LED flashing 3 times? Call for heat. Thermostat contacts R & W close. Jumper pressure switch. Disconnect electric power at fuse or circuit breaker .
www.white-rodgers.com 263 TECHNICAL HELP Main Burner Ignition Check. Inducer ON. Does ignitor warm up and glow? YES YES NO NO Does burner ignite? T ur n power OFF to furnace. Unplug ignitor from wire harness. Connect voltmeter across ignitor wiring harness leads from control.
www.white-rodgers.com 264 TECHNICAL HELP Flame Sensor Check Does main burner remain lit? YES NO YES NO Is blow er at heat speed within 1 minute of burner ignition? Does ignitor remain energized with flame present? De-energize system. Disconnect 12-pin connector .
An important point after buying a device Emerson 50A55 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson 50A55 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson 50A55 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 50A55 you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 50A55 will certainly help you make a decision on the purchase.
If you already are a holder of Emerson 50A55, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson 50A55.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson 50A55. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 50A55 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
