Emerson White-Rodgers 48C21-707 Mode D'emploi page 4

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TROUBLESHOOTING
Fault and Status Codes
The LED will indicate fault or status codes as shown in the table below:
7 Segment (characters
will alternate)
CFM: Each Flash of Green LED = 100 CFM
Use for Airflow Approximation Only (Example: 8 Flashes = 800 CFM)
NOTE: Defrost is displayed as H1 in a legacy setup
Fault Recall
When the control is in standby mode (no call for heat or cool),
press the "SELECT" button for approximately two – five seconds.
NOTE: While displaying the stored fault codes, the control will
ignore any new call for heat, cool or fan. Consecutively repeated
faults are displayed a maximum of three times.
Emerson and White-Rodgers are
trademarks of Emerson Electric Co.
©2017 Emerson Electric Co. All
rights reserved.
None
Internal Control Fault / No Power
On
Standby, Waiting for Inputs
Ec
Heater Kit Too Large, Too Small, Or No Match
E5
Fuse Open
EF
Auxiliary Switch Open
d0
Data Not On Network
d1
Invalid Data On Network
d4
Invalid Memory Card Data
b0
Blower Motor Not Running
b1
Blower Motor Communication Error
b2
Blower Motor HP Mismatch
b3
Blower Motor Operating in Power, Temp., Or Speed Limit
b4
Blower Motor Current Trip or Lost Rotor
b5
Blower Motor Rotor Locked
b6
Over / Under Voltage Trip or Over Temperature Trip
b7
Incomplete Parameter Sent to Motor
b9
Low Indoor Airflow
C1
Low Stage Cool - Legacy Mode Only
C2
High Stage Cool - Legacy Mode Only
P1
Low Stage Heat Pump Heat - Legacy Mode Only
P2
High Stage Heat Pump Heat - Legacy Mode Only
h1
Emergency Heat Low - Communicating Mode Only
h2
Emergency Heat High - Communicating Mode Only
FC
Fan Cool - Communicating Mode Only
FH
Fan Heat - Communicating Mode Only
F
Fan Only
H1
Electric Heat Low
H2
Electric Heat High
dF
Defrost - Communicating Mode Only
TECHNICAL SUPPORT: 1-888-725-9797
white-rodgers.com
emerson.com
Error / Condition
Fault Code Reset
When the control is in standby mode (no call for heat or cool),
press the "SELECT" button for five to ten seconds or until the
diagnostic LED begins to rapid flash.
NOTE: If the switch is held pressed for over ten seconds the
rapid flash will stop and the LED will be on to indicate return
to normal status.

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