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All installations and services must be performed by qualified service personnel. 

12 

C.  TROUBLESHOOTING CHARTS 
 

CONFIRM IF EITHER BLOWER

 

WHEEL IS RUBBING AGAINST

 

HOUSING OR MOTOR SHAFT

 

IS SPINNING FREELY, REPAIR

 

OR REPLACE AS NECESSARY.

 

DOES BLOWER SPIN FREELY?

 

IS THERE 115V 

 

SUPPLIED TO MOTOR?

 

CHECK 115V SUPPLY, 

 

CONNECTION FUSES, 

 

SERVICE SWITCH AND 

 

DOOR SWITCH.

 

CHECK HARNESS 

 

CONNECTIONS

 

AND WIRE.

 

NO

 

YES

 

YES

 

YES

 

YES

 

NO

 

NO

 

NO

 

NO

 

NO

 

YES

 

YES

 

DISCONNECT 16 PIN 

 

HARNESS FROM 

 

MOTOR.  IS THERE 12VDC

 

ACROSS PIN12 & PIN1 

 

AND PIN12 & PIN3 

 

AT THE HARNESS PLUG?

 

CHECK CONNECTION ON HARNESS AND MOTOR, 

 

RECONNECT HARNESS TO MOTOR, IF 

 

CONNECTIONS ARE GOOD AND MOTOR STILL 

 

DOES NOT RUN REPLACE MOTOR.

 

THIS GUIDE SHOULD BE USED IN THE CASE OF A STOPPED OR MANFUNCTIONED ECM

 

BLOWER MOTOR.  THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF 

 

MALFUNCTION OR DEVIATION FROM THE NORMAL BLOWER OPERATION.

 

TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES.

 

CHECK 24VAC 
SUPPLY 

 

TO INTEGRATED CONTROL.

 

IS THERE 24VAC

 

ACROSS R & 

 

B/C ON THE

 

INTEGRATED

 

CONTROL?

 

REPLACE 

 

INTEGRATED 

 

CONTROL.

 

TURN THERMOSTAT MANUAL FAN

 

SWITCH ON (IF AVAILABLE) OR JUMPER

 

BETWEEN R & G ON INTEGRATED CONTROL.  

 

IS THERE VOLTAGE GREATER THAN 

 

12VDC BETWEEN PIN15 & PIN1?

 

CHECK CONNECTIONS AND WIRES

 

AT INTEGRATED CONTROL, IF OK 

 

REPLACE INTEGRATED CONTROL.

 

DISCONNECT 16PIN 

 

HARNESS FROM 

 

INTEGRATED CONTROL.

 

IS THERE 12VDC ACROSS 

 

PIN 6 & PIN 1

 

AT THE CONROL?

 

 

Summary of Contents for OL11-105FDBE

Page 1: ...DS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER REFERRED TO IN THESE INSTRUCTIONS AS A QUALIFIE...

Page 2: ......

Page 3: ...I BLOWER CONTROL INFORMATION 1 A TERMINAL DEFINITIONS FIELD WIRING 1 B WIRING SWITCHES 2 C INPUTS 4 D OUTPUTS 4 E OPERATING MODES 5 F CFM TABLES 7 G ECM SPECIFIC REPLACEMENT PARTS 8 III ECM TROUBLESH...

Page 4: ...mostat call for heat R 24 VAC to thermostat G Thermostat call for fan Y Thermostat call for cool DEHUM Humidistat call for dehumidification TXV systems ONLY Thermostat Humidistat connections for 2 Sta...

Page 5: ...All installations and services must be performed by qualified service personnel 2 B WIRING SWITCHES OL11 OL16 LOWBOY Figure 1 BLOWER WIRING...

Page 6: ...lations and services must be performed by qualified service personnel 3 TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring Figure 2 BOARD LAYOUT WITH SWITCHES B...

Page 7: ...oling is recognized when the thermostat connects Y to R This input has an indicator LED that will light when the control receives a call for cooling Refer to the Cool Mode section for the control oper...

Page 8: ...their respective thermostat connections W Y G and DEHUM and operate whenever a call is present See Diagnostic Features for a function description of operation Motor CFM LED This green LED will flash...

Page 9: ...d low fire is activated for 15 minutes If a call for heat still exists high fire will be activated and will continue until the demand for heat has been satisfied Counterflow units in addition will run...

Page 10: ...es their tabular values are enacted when their function is called Three additional dip switches select 8 heating speeds which are enacted when heat is called This allows independent selection of heati...

Page 11: ...rness 350271 350271 Transformer 350464 350464 Power Choke 350855 COOLING SPEEDS HEATING SPEEDS TEMPERATURE RISE F Rise CFM COOL LOW DEHUM 3 ON 6 OFF 2 OFF 5 OFF 1 OFF 4 OFF 3 ON 6 OFF 2 OFF 5 OFF 1 ON...

Page 12: ...servicing motor Wait at least 5 minutes after disconnecting power before opening motor SYMPTOM CAUSE PROCEDURE Motor rocks slightly when starting This is normal start up for ECM Motor won t start No...

Page 13: ...moving panel or filter reduce puffing Reduce restriction Reduce max airflow Evidence of Moisture Motor failure or malfunction has occurred and moisture is present Replace motor and perform Moisture Ch...

Page 14: ...rain plugged Check for low airflow too much latent capacity Check for undercharged condition Check and plug leaks in return ducts cabinet Comfort Check Check proper airflow settings Low static pressur...

Page 15: ...TO MOTOR IF CONNECTIONS ARE GOOD AND MOTOR STILL DOES NOT RUN REPLACE MOTOR THIS GUIDE SHOULD BE USED IN THE CASE OF A STOPPED OR MANFUNCTIONED ECM BLOWER MOTOR THE FOLLOWING SHOULD HELP ESTABLISH THE...

Page 16: ...Status LED Off 1 HEAT mode On 2 BLOWER HEAT 3 Status LED Flashes 1 COOL mode On 2 Blower On Delay Started 3 Condenser On 4 Status LED On continuous 1 FAN mode On 2 BLOWER LOW 3 Status LED On continuo...

Page 17: ...Fire Connect 2 Stage T stat to both W1 and W2 Single Stage T stat W2 Connect single stage T stat to W2 only BLOWER Speeds HEAT The Heating Blower speed selected by positions 1 2 3 of SW1 CFM tables o...

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