Bryant 3Model 383KAV User Manual download pdf (Page 10)

Is circuit breaker closed?

Close door switch and go to start.Is red LED status light on? Is door switch closed?

Is red LED status light blinking

rapidly without a pause?

Is there 115v going to switch?

Replace door switch.Replace control center.

Replace transformer.

Is red LED status light blinking

ON/OFF slowly with a

combination of short and long

flashes?

Check for correct line voltage

polarity. If units are twinned,

check for proper low-voltage 

(24v) transformer phasing.

Check for previous fault by 

momentarily shorting the TEST

terminal and the C terminal until

the LED goes out. LED will flash

the status code of any previous

fault or the code No. 11 (1 short

and 1 long flash) if no previous

fault. After the control repeats the

code 3 times, the control will go

through a brief component test

sequence. The inducer will start

and run for the entire component

test. The HSI, blower motor heat

speed, and blower motor cool 

speed will run for 10-15 sec each.

Determine status code. The

status code is a 2 digit number

with the first digit determined by

the number of short flashes and

the second digit by the number of

long flashes.

Once status code is determined,

the control will go through a brief

component test sequence. The

inducer will start and run for the

entire component test. The HSI,

blower motor heat speed, and 

blower motor cool speed will run

for 10-15 sec each.

Was there a previous fault code

other than No. 11?

Does control respond to W, Y,

or G 24-vac thermostat signals?

Run system through a heating or

cooling cycle to check operation.

Status codes are erased after 48

hrs or whenever power (115v

or 24v) is interrupted.

Go to section with status code

determined.

Is there 115v at L1 and L2?

Close circuit breaker and

go back to start.

Check for continuity in wire from circuit

breaker to furnace.

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

NO

NO

YES

YES

YES

START

Is there 24v at SEC-1 and SEC-2?

NO

Is 24 vac present at W, Y, or G

terminals on the control?

Replace control if it does not

respond to 24-vac signal at W, Y,

or G screw terminals.

Check room thermostat or

interconnecting cable.

YES

NO

NO

TROUBLESHOOTING GUIDE

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