DEMAND
BEGINS
MISMATCHED
RPM
CRC FAILURE
DEFAULT FAN MOTOR SPEED
USED
DEFAULT FAN MOTOR SPEED USED
LED CONTINUOUS FAST
FLASH
LED CONSTANT ON
REPLACE FAN MOTOR CONTROL BOARD
REPLACE FAN MOTOR CONTROL BOARD
YES
SINGLE STAGE
OR EDA
OPERATION
NO
DEMAND
ENDED
ECM1/Y1
ONLY OR ECM2/Y2
ONLY
FAN MOTOR RPM SET PER JUMPER SETTINGS
STAGE LED INDICATOR: ONE 
SLOW FLASH AND ONE SHORT PAUSE FOR SINGLE STAGE OR EDA OPERATION
LED RPM INDICATOR:
EXAMPLE: (2−TON
UNIT) – 5 SLOW
FLASHES AND ONE
LONG PAUSE
Figure 32. Fan Motor Control One Stage LED Sequence of Operation
TOP GRILLE OR FAN MOTOR MOUNT ADJUSTMENT FOR FAN CLEARANCE
Sometimes during shipping, either the fan motor mounting or top grille may become out of alignment. This may cause the fan motor blade to not clear the orifice ring. If this situation occurs, simply adjust either or both the fan motor mount or top grille positions to allow proper clearance. The top grille four fastener insertion points to the plastic top and motor mount locations are larger than the fasteners used to secure the grille and fan motor mounts. Use the procedures provided in figure 33 to adjust for fan clearance.
GRILLE MOUNTING
PUSHPOINTS FORWARD
PUSH
FORWARD
FASTENER
INSERTION POINT
FAN MOTOR MOUNTING POINTS
The four mounting point holes that secure the top grille to the plastic top are larger than the fasteners used to secure the grille. this is also true for the four fasteners securing the fan motor to the top grille. To provide more clearance, preform either or both of the following procedures.
TOP GRILLE ADJUSTMENT
loosen the four grille mounting fasteners and push the grille forward. tighten mounting hardware. if there is still insufficient clearance proceed to Fan Motor Position Adjustment.
FAN MOTOR POSITION ADJUSTMENT
Loosen the four fan motor grille mounting fasteners and push the fan motor forward. tighten mounting hardware.
GRILLE MOUNTING POINTS | ORIFICE RING |
Figure 33. Fan Blade Clearance Adjustment
Page 47
XP17 SERIES