Bryant 355MAV User Manual Page 1

NOTE: Read the entire instruction manual before starting theinstallation.This symbol → indicates a change since the last issue.WARNING: ELECTRICAL SHO

CAUTION: UNIT DAMAGE HAZARDFailure of plastic components may occur.Do not use ethylene glycol (Prestone II antifreeze/coolantor equivalent automotive

The furnace control stores all status codes for a period of 72 hours,regardless of 115-v or 24-v power interruption.NOTE: Removing blower access panel

3. The control can also assist in troubleshooting by performinga Component Test. The Component Test will functionallyoperate all furnace components, e

Fig. 17—Service LabelA02279COMPONENT TEST11 NO PREVIOUS CODE - Stored status codes are erased automatically after 72 hours or asspecified above.12 BLO

Fig. 18−Wiring DiagramA02291LEGENDJUNCTIONTERMINALCONTROL TERMINALFACTORY POWER WIRING (115VAC)FACTORY CONTROL WIRING (24VAC)FIELD CONTROL WIRING (24V

A02350aTroubleshooting Guide – Variable SpeedSTARTIs AMBER LED status light on?Is there 24V at SEC-1 and SEC-2?Is there 115V at L1 and L2?Replace furn

A02350b11 NO PREVIOUS CODE – Status codes areerased after 72 hours or can be manuallyerased by putting setup switch SW1-1 inthe ON position and jumper

A02350c25 INVALID MODEL SELECTION ORSETUP ERROR – If status code 25 onlyflashes 4 times on power-up the control ismissing its model plug PL4 and isdef

A94328SERVICE TRAININGPackaged Service Training programs are an excellent way to increase yourknowledge of the equipment discussed in this manual, inc

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Untrained personnel can perform basic maintenance functionsdescribed in User’s Information Manual such as cleaning andreplacing air filters. All other

© 2004 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231—20—Printed in U.S.A. SP0564 Catalog No. 5335-523

7. An ESD service kit (available from commercial sources)may also be used to prevent ESD damage.CARE AND MAINTENANCEFor continuing high performance an

The following items should be performed by a qualified servicetechnician.Clean blower motor and wheel as follows:1. Turn off electrical supply to furn

III. CLEANING BURNERSThe following items should be performed by a qualified servicetechnician. If the burners develop an accumulation of light dirt or

6. Remove screws attaching intake housing to burner box, androtate intake housing away from burner box for removal.7. Using backup wrench, disconnect

CAUTION: UNIT DAMAGE HAZARDDO NOT use wire brush or other sharp object to inspector dislodge materials in secondary heat exchangers asfailure of the s

WARNING: FIRE OR EXPLOSION HAZARDFailure to follow the safety warnings exactly could resultin serious injury, death or property damage.Never test for

The 24-v circuit contains an automotive-type, 3-amp fuse locatedon the furnace control. (See Fig. 13.) Any direct shorts of the 24-vwiring during inst