Bryant 355MAV Service And Maintenance Procedures

With power to the unit disconnected, check all electrical connec-
tions for tightness. Tighten all screws on electrical connections. If
any smoky or burned connections are found, disassemble the
connection, clean all parts, strip wire, and reassemble properly and
securely.
Reconnect electrical supply to unit and observe unit through 1
complete operating cycle. Electrical controls are difficult to check
without proper instrumentation; if there are any discrepancies in
the operating cycle, contact your dealer and request service.
VIII. TROUBLESHOOTING
For an explanation of fault codes, refer to service label located on
back of main furnace door or Fig 16.
The control center stores all fault codes for a period of 5 "good or
proper" operating cycles, regardless of 115- or 24-v power
interruption.
NOTE: Removing blower access panel will open blower access
panel door switch and terminate 115-v power to control center.
Look into blower access panel sight glass for current LED status.
Fig. 12—Field Wiring
A93049
Fig. 13—Variable-Capacity Control Center
A93062
W2
COM
24V
W/W1 Y/Y2
RG
HUM
HOT SURFACE
IGNITOR CONNECTOR
EAC-ELECTRONIC AIR
CLEANER TERMINALS
(115-VAC 1 AMP MAX)
115-V
CONNECTORS
24-V THERMOSTAT
TERMINALS
PRESSURE SWITCH
CONNECTOR
HUM-HUMIDIFIER
TERMINAL
(24-VAC 0.5 AMP MAX)
TRANSFORMER
24-V CONNECTORS
3-AMP FUSE
STATUS AND DIAGNOSTIC
LED LIGHTS
AIR CONDITIONING
(A/C) SETUP SWITCH
SETUP SWITCHES
(SW) AND BLOWER
OFF DELAY SETUP
SWITCHES
MODEL PLUG
COMMUNICATION
CONNECTOR
CONTINUOUS
FAN (CF) SETUP
SWITCHES
MAIN BLOWER
CONTROL WIRE
CONNECTOR
DEHUMIDIFIER (DH) 
CONNECTOR
—8—

Bryant 355MAV Specifications

General

Brand	Bryant
Model	355MAV
Category	Furnace
Language	English