25
AIR HANDLER DIAGNOSTIC CODES
Descriptions of the ICC diagnostic codes are provided below:
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
7-Segment
LEDs Display
Code
Diagnostic Description
d1 – No Shared Data
The control board does not have shared data.
• Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
• Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
Status/Possible Cause – Troubleshooting
Information
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
d4 – (Device) Memory Card Invalid for
Device
The memory card is missing or the data in the
memory card does not match the data in the
control.
• Check memory card to ensure it matches
device
• Check if memory card is present
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
• Replace the air handler motor with the correct
horsepower motor.
• Replace the memory card with correct system
information.
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
d6 – BLWR HP CNFLCT
Blower Horsepower conflict
The horsepower data in the memory card
does not match the motor horsepower.
• Replace the motor with correct horsepower
motor.
• Replace the memory card with correct system
information. Check memory card to ensure
it matches device
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
d8 – Old Shared Data
System data is obsolete
• If system will not operate, order new memory
card to update system information.
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
• Make sure the ECM motor wiring harness is
plugged into the ECM motor and control
board.
• Test the ECM motor for proper operation using
a service tool.
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
• Make sure the sensor is plugged into the air
handler control board.
• Check the resistance of the sensor. Replace if
it is out of tolerance.
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
The control board does not have shared
data.
•
Replace memory card with correct system
information
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
The data in the memory card inserted into
the control board does not match the data in
the control.
•
Check memory card to ensure it matches
device
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
•
Replace the air handler motor with the correct
horsepower motor.
•
Replace the memory card with correct system
information.
d8 – Old Shared Data
System data is obsolete
•
If system will not operate, order new memory
card to update system information.
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
•
Make sure the ECM motor wiring harness
plugged into the ECM motor and control
board.
•
Test the ECM motor for proper operation using
a service tool.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
•
Make sure the sensor is plugged into the air
handler control board.
•
Check the resistance of the sensor. Replace if
it is out of tolerance.
93 – Internal Control Fault
The air handler control is not functioning.
•
Check control for proper system operation.
•
Replace control
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
• Make sure the sensor is plugged into the air
handler control board.
• Check the resistance of the sensor. Replace if
it is out of tolerance.
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
93 – Internal Control Fault
The air handler control is not functioning.
• Check control for proper system operation.
• Replace control
60 – BLWR FLT–RUN
The ECM motor is running but has a
fault
• TEST the ECM for proper operation.
0
61 – BLWR FLT–NO RUN
The ECM motor is not operating
• Make sure the ECM motor wiring harness is
plugged into the ECM motor and control board.
• Test the ECM motor for proper operation.
13
X.X Air Handler Diagnostic Codes
Descriptions of the air handler serial communicating control diagnostic codes are provided
below. These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT
: Air handler diagnostic codes are available at the thermostat when the system is
wired for serial communications. If
7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
d1 – No Shared Data
ELECTRONICS GROUP TO
DESCRIBE
d3 – Airflow CFM Mismatch
The indoor air mover (air handler/furnace)
cannot supply the required airflow for
proper system operation
•
Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
d4 – (Device) Memory Card Invalid for
Device
•
•
•
30 – Fuse Open
The ICC detects the on-board fuse is open
•
The 3-amp fuse on the ICC is open.
•
Low voltage wiring at R and C is damaged or
miswired.
•
•
d7 – BLWER MFG CNFLCT
The System does not have any data on the
installed motor.
• Replace the memory card with correct system
information.
7
CONVENTIONAL THERMOST
A
T WIRING
Summary of Contents for RHPL-HM2421JC
Page 37: ...37 FIGURE 29 AIR HANDLER EQUIPPED WITH Serial Communication WIRING DIAGRAM...
Page 38: ...38...
Page 39: ...39...
Page 40: ...40 CM 0411...
