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

Page 47
Image 47
Lennox International Inc Dave Lennox Signature Collection XP17 System HEAT PUMPS Demand Begins, TOP Grille Adjustment