Bryant EVOLUTIONR EXTREME 280ANV - Manual (Page 15)

15
Status Codes
Table 7 shows the status codes flashed by the amber status light.
Most system problems can be diagnosed by reading the status code
as flashed by the amber status light on the control board.
The codes are flashed by a series of short and long flashes of the
status light. The short flashes indicate the first digit in the status
code, followed by long flashes indicating the second digit of the
error code.
The short flash is 0.25 seconds ON and the long flash is 1.0 second
ON. Time between flashes is 0.25 seconds. Time between short
flash and first long flash is 1.0 second. Time between code
repeating is 2.5 seconds with LED OFF.
Codes are easily read from user interface (UI)
EXAMPLE:
3 short flashes followed by 2 long flashes indicates a 32 code.
Table 7 shows this to be low pressure switch open.
Emergency Mode Connections with a Conventional
Dual Fuel Thermostat
In an emergency, it is possible to replace the UI with a
conventional heat pump thermostat (must be dual fuel capable if
using a furnace), see Fig. 19 for wiring. However, this emergency
mode operation is limited to a single, maximum compressor speed
in heating and a single maximum cooling speed.
D
C
B
A
User Interface (UI)
D
C
B
A
No
Use
C
B
A
VS HP
OA
T
R
Y
O
W
C
HUM
C
Humidifier
24v
ac
C and D
not required on
VS Heat Pump
Furnace or Fan Coil
A12055
Fig. 18 -- Evolution Furnace or Fan Coil Wiring with
Communicating Variable Speed HP
D
C
B
A
VARIABLE
SPEED HP
OA
T
G
Y
OW
C
HUM
Furnace or Fan Coil
C
B
A


UT
IL
C
LS
O
Y
R
G
Y
OW
C
R
Conventional
Dual-Fuel
Thermostat
A12047
Fig. 19 -- Variable Speed Unit Connected to a Conventional
Dual Fuel Thermostat in an Emergency Mode