Carrier 58CTA, Installation And Service Instructions Manual

A05001

11

NO PREVIOUS CODE

– Stored codes

are er

ased after 72 hours

.  On RED LED

boards stored status codes can also be

er

ased whene

v

er po

w

er (115V or 24V)

is interr

upted.

  Run system through a

lo

w-heat, high-heat, or cooling cycle to

chec

k system.

12

BLO

WER ON AFTER PO

WER UP

–

(115V OR 24V)

– Nor

mal oper

ation.

Blo

w

er r

uns f

or the selected b

lo

w

er off-

dela

y,

 if unit is po

w

ered up dur

ing a call

for heat (R-W/W1 closed) or when (R-

W/W1 opens) dur

ing the b

lo

w

er on-dela

y

per

iod.

13

LIMIT CIRCUIT LOCK

OUT

– Loc

k

out

occurs if the limit, dr

aft saf

eguard, flame

rollout, or b

loc

k

ed v

ent s

witch* (if used)

is open longer than 3 min

utes

.  Control will

auto-reset after 3 hours

.  See code 33.

14

IGNITION LOCK

OUT

– System f

ailed to

ignite gas and pro

v

e

 flame in 4 attempts

.

Control will auto-reset after 3 hours

.  See

status code 34.

21

GAS HEA

TING LOCK

OUT

– 

T

u

rn

 off

po

w

er and w

ait 5 min

utes to retr

y.

Chec

k f

o

r:

-

Stuc

k closed gas v

alv

e rela

y on

control.

-

Mis

wire or shor

t to gas v

alv

e wire

.

2

2

ABNORMAL FLAME-PR

O

VING SIGNAL

Flame is pro

v

ed while gas v

alv

e is de-

energiz

ed.

  Inducer will r

un until f

ault is

cleared.

  Chec

k f

o

r:

-

Stuc

k open or leaky gas v

alv

e

.

23

PRESSURE SWITCH DID NO

T OPEN

Chec

k f

o

r:

-

Obstr

ucted pressure tube

.

-

Pressure s

witch stuc

k closed.

24

SECOND

AR

Y 

V

O

LT

A

GE FUSE IS

OPEN   Chec

k f

o

r:

-

Shor

t circuit in secondar

y v

oltage

(24V) wir

ing including ther

mostat

leads

.  Disconnect ther

mostat leads

to isolate shor

t circuit.

31

HIGH-HEA

T PRESSURE SWITCH OR

RELA

Y DID NO

T CLOSE OR

REOPENED - Chec

k f

o

r:

-

Control rela

y ma

y be def

ectiv

e

.

-

Gas v

alv

e is mis

wired.

-

See status code 32.

32

LO

W

-HEA

T PRESSURE SWITCH DID

NO

T CLOSE OR REOPENED

– If open

longer than 5 min

utes

, inducer shuts off

for 15 min

utes bef

ore retr

y.

  If opens

dur

ing b

lo

w

er on-dela

y per

iod, b

lo

w

er

will come on f

or the selected b

lo

w

er off-

dela

y.

  Chec

k f

o

r:

-

Proper v

ent sizing.

-

L

o

w

 inducer v

oltage (115V).

-

L

o

w

 inlet gas pressure (if LGPS used).

-

Inadequate comb

ustion air supply

.

-

Disconnected or obstr

ucted pressure

tubing.

-

Def

ectiv

e inducer motor

.

-

Def

ectiv

e pressure s

witch.

-

Excessiv

e wind.

-

Restr

icted v

ent.

33

LIMIT CIRCUIT F

A

UL

T

–

 Indicates the

limit, dr

aft saf

eguard, flame rollout, or

b

loc

k

ed v

ent shutoff s

witch* (if used) is

open.

Blo

w

er will r

un f

or 4 min

utes or until

open s

witch remak

es whiche

ver is longer

.

If open longer than 3 min

utes

, code

changes to loc

k

out #13.

  If open less

than 3 min.

 status code #33 contin

ues

to flash until b

lo

w

er shuts off

.  Flame

rollout s

witch and BVSS requires man

ual

reset.

  Chec

k f

o

r:

-

Dir

ty filter or restr

icted duct system.

-

Loose b

lo

w

er wheel.

-

Def

ectiv

e s

witch or connections

.

-

Def

ectiv

e b

lo

w

er motor or capacitor

.

-

Inadequate comb

ustion air supply

(flame rollout s

witch open).

-

Restr

icted v

ent.

-

Proper v

ent sizing.

-

Excessiv

e wind.

3

4

IGNITION PR

O

VING F

AILURE

– If flame

is not sensed dur

ing the tr

ial f

or ignition

per

iod, the control will repeat the ignition

sequence 3 more times bef

ore loc

k

out

#14 occurs

.  If flame signal is lost dur

ing

the b

lo

w

er on-dela

y per

iod, b

lo

w

er will

come on f

or the selected b

lo

w

er off-dela

y.

Chec

k the f

ollo

wing items first bef

ore

proceeding to the ne

xt step

.

-

Gas v

alv

e tur

ned off

.

-

Man

ual shut-off v

alv

e

.

-

Green/Y

ello

w wire MUST be connected

to fur

nace sheet metal.

-

Flame sensor m

ust not be g

rounded.

T

o

 deter

mine whether the prob

lem is in

the gas v

alv

e

, igniter

, or flame sensor

the system can be oper

ated in the

component test mode to chec

k the igniter

.

First remo

ve

 the R ther

mostat connection

from the control and initiate the

component test sequence

.  Does the

igniter glo

w or

ange/white b

y

 the end of

the 15 second w

a

rm-up per

iod?

4

3

LO

W

-HEA

T PRESSURE SWITCH OPEN

WHILE HIGH-HEA

T PRESSURE

SWITCH IS CLOSED -  Chec

k f

o

r:

-

L

o

w-heat pressure s

witch stuc

k open.

-

Disconnected or obstr

ucted pressure

tube

.

-

Mis

wired pressure s

witches

.

-

L

o

w

 inlet gas pressure (if LGPS used).

Unplug igniter har

ness from control and

initiate another component test sequence

.

Chec

k f

or 115V betw

een pin 1 and

NEUTRAL-L2 on the control.

W

as 115V

present f

or the 15 second per

iod?

Reconnect the R ther

mostat lead and set

ther

mostat to call f

or heat.

  Connect v

oltmeter

across gas v

alv

e connections

.  Does gas

v

alv

e receiv

e 24V?

Does gas v

alv

e open and allo

w gas to flo

w?

Do the main b

u

rners ignite?

Do the main b

u

rners sta

y on?

Repeat call f

or heat and chec

k flame sensor

current dur

ing tr

ial f

or ignition per

iod.

  Is the

DC microamps belo

w 0.5?

Clean flame sensor with fine steel w

ool and

rechec

k current.

  Nominal current is 4.0 to

6.0 microamps

.

Fix

ed.

4

5

CONTR

OL CIRCUITR

Y LOCK

OUT A

uto-

reset after 1 hour loc

k

out due to:

-

Flame circuit f

ailure

.

-

Gas v

alv

e rela

y stuc

k open.

-

Softw

are chec

k error

.

Reset po

w

er to clear loc

k

out.

  Replace

control if code repeats

.

Replace fur

nace control.

Chec

k f

or contin

uity in the har

ness and igniter

.

 Replace def

ectiv

e component.

Chec

k connections

.  If OK, replace control.

Chec

k that all gas v

alv

es are tur

ned on.

Replace v

alv

e

.

Chec

k f

o

r:

-

Inadequate flame carr

y

o

v

er or rough

ignition.

-

L

o

w

 inlet gas pressure

.

-

Proper fir

ing r

ate

.

-

Bloc

k

ed or incorrect carr

y- o

v

er gap

.

(.045”

 nominal)

Allo

w b

lo

w

er to come on and repeat test to

chec

k f

or inter

mittent oper

ation.

Chec

k connections and retr

y.

  If current is

near typical v

alue (4.0-6.0 nominal) and

b

u

rners will not sta

y on, repeat chec

k in high-

heat.

  If b

u

rners will still not sta

y on replace

control.

  If b

u

rners oper

ate in high-heat then

switch to lo

w-heat, chec

k manif

old pressure

.

 If OK, chec

k b

u

rner carr

y

o

v

er and flame

sensor location.

NO

YES

YES

YES

YES

NO

YES

YES

YES

* Bloc

k

ed v

ent shutoff s

witch used in Chimne

y Adapter Kit

NO

YES

NO

NO

NO

YES

NO

NO

Replace electrode

.

Is current near typical v

alue?

NO

Replace fur

nace control.

Will main b

u

rners ignite and sta

y on?

54