Carrier 58RAV Furnace User Manual


 
Close door switch and go to start.
Is circuit breaker closed?
Is red LED status light on?
Is red LED status light blinking
rapidly without a pause?
Is door switch closed?
Is there 115v going to switch?
Replace control board.
Replace door switch.
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 11 (ONE
SHORT AND ONE LONG
FLASH) if no previous fault. After
the control repeats the code 3
times, it will sequentially operate
inducer motor, HSI, blower motor
relay heat speed, and cool speed
for approximately 10 - 15 sec,
then go off.
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 by
operating inducer motor, HSI,
blower motor relay heat speed,
and cool speed for approximately
10-15 sec, then go off.
Was there a previous fault code
other than No. 11?
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?
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
YES
YES
YES
START
Is there 24v at SEC-1 and SEC-2?
NO
TROUBLESHOOTING GUIDE
Replace transformer.
Close circuit breaker and
go back to start.
NO
Check for continuity in wire from
circuit breaker to furnace.
YES
10