24
DIAGNOSTIC CODES
On Normal Operation
--
Eb NO HTR KIT INSTALLED - SYSTEM CALLING FOR AUXILIARY HEAT (Minor Error Code) (No Display)
Ed HEATER KIT DIP SWITCHES NOT SET PROPERLY Check Heater Kit Dip Switches
E5 FUSE OPEN BLOWN FUSE
EF AUXILIARY SWITCH OPEN Auxiliary Contacts Open
d0 DATA NOT ON NETWORK Data Not Yet On Network
d1 INVALID DATA ON NETWORK Invalid Data On Netwrok
d4 INVALID MEMORY CARD DATA Invalid Memory Card data
b0 BLOWER MOTOR NOT RUNNING Blower Motor Not Running
b1 BLOWER MOTOR COMMUNICATION ERROR Blower Communication Error
b2 BLOWER MOTOR HP (Horse power) MISMATCH Blower Motor HP Mismatch
b3 BLOWER MOTOR OPERATING IN POWER, TEMP., OR SPEED LIMIT (No Display)
b4 BLOWER MOTOR CURRENT TRIP OR LOST ROTOR Blower Trip or Lost Rotor
b6 OVER/UNDER VOLTAGE TRIP OR OVER TEMPERATURE TRIP Voltage or Temperature Trip
b7 INCOMPLETE PARAMETER SENT TO MOTOR Incomplete Parameters Sent to Motor
b9 LOW INDOOR AIRFLOW (Minor Error Code) (without EH mode) (No Display)
9b
LOW INDOOR AIRFLOW
(Major Error Code) (EH mode only)
LOW ID AIR EH MODE
70 EEV DISCONNECTION DETECTED
EEV OPEN CKT
73 LIQUID SIDE THERMISTOR ABNORMALITY
LIQ TEMP FLT
74 GAS SIDE THERMISTOR ABNORMALITY
GAS TEMP FLT
75 PRESSURE SENSOR ABNORMALITY
PRESSURE FLT
77
INDOOR UNIT - THERMOSTAT COMMUNICATION ERROR
(STARTUP OPERATION & DURING OPERATION)
TSTA T ID NO COM
Hu
HUMIDIFICATION DEMAND
(Running without heating)
--
FC FAN COOL - COMMUNICATING MODE ONLY (Fan Demand-Cool)
--
FH FAN HEAT - COMMUNICATING MODE ONLY (Fan Demand-Heat)
--
F FAN ONLY (Fan Demand-Manual)
--
H1 ELECTRIC HEAT LOW (Heat Demand, Back-up Heat Demand)
H2 ELECTRIC HEAT HIGH (Heat Demand, Back-up Heat Demand)
dF DEFROST - COMMUNICATING MODE ONLY (note: defrost is displayed as H1 in a legacy setup)
--
7 SEGMENT LED
DISPLAY
DESCRIPTION OF CONDITION ERROR MESSAGE
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