Troubleshooting Guide - Carrier 59TN6A Installation, Start-Up, Operating And Service And Maintenance Instructions

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START
IsAMBERLEDstatus light on?
YES
I s AMBER LED status light blinking rapidly without a pause?
1! NO
I Is AMBER LED status light blinking
ON/OFF slowly with a combination of
short and long flashes?
!! YES
Determine status code. The status code
is a 2 digit number with the first digit
determined bythe number of short
flashes and the second digit by the
number off ong flashes?
,L
Go to section below for the status code
that was flashed.
Troub leshooting Guide
-_ s there115V at L1 andL2?
YES
I Is there 24V at SEC-1 and SEC-2?
_! YES
Replacefurnace control.
Is door switch closed?
YES
I"_ I Is there 115V going to switch?
YES
l [ Replace d..... itch.
I__ Check for correct line voltage polarity. If
units are twinned, check for proper low-
voltage (24V) transformer phasing.
--_ Replace transformer.
To recall previous status codes disconnect the R
thermostat connection, reset power, and put setup
switch BWI-I in the ON position. The AMBER LED
will flash the status codes in the order of occurrence.
Record status codes until status code #I I flashes (I
short and 1 long flash). After status code #11
flashes the status codes will repeat. Status codes
are erased after 72 hours or can be manually erased
by putting setup switch BW1-1 in the ON position
and jumpering R, W/W1, and Y/Y2 simultaneously
until status code #11 is flashed. When done put
setup switch BW1-1 in the OFF position.
,L
Was there a previous status code other than #I I?
t_ Does the control respond to WA_VI, W2,
Y1, Y/Y2, and G (24V) thermostat
signals?
7! YES
Run system through a low-heat, high-
heat, or cooling cycle to check operation.
Status codes are erased after 72 hours
or can be manually erased by putting
setup switch SWl-1 in the ON position
and jumpering R, W/W1, and Y/Y2
simultaneously until status code #I I is
flashed.
I Replace furnace control.
1
I
Is door switch closed?
Is circuit breaker closed?
YES
Check for continuity in wire from circuit
breaker to furnace.
Close circuit breaker and go back to
START.
Check room thermostat or
interconnecting cable.
l.o
Is 24V present at WA,VI, W2, Y1, Y/Y2 or
G thermostat terminals on the furnace
control?
I YES
Disconnect all the thermostat wires from
the furnace control.
l
Does the problem repeat when using a
jumper wire?
1.°
The thermostat is not compatible with the
furnace control. Either install a ballast
resistor, connect the Com24V thermostat
terminal to the thermostat, or replace the
thermostat.
]
NO