58mtb – Carrier 58MTB User Manual

Page 18

NO PREVIOUS

CODE

– Stored codes

are erased

after 72 hour

. On RED

LED

boards stored stat

us codes

can also be

erased whene

er po

wer (11

5V or 24V

)

is interr

upted.

Run system through a

w-heat, high-

heat, or cooling cyc

le to

chec

k sys

tem.

BLO

WER ON AFTER

WER UP

–

(115V OR 24V) – N

mal operation.

Blo

er r

uns f

or the selected b

low

er off-

dela

y, if unit

is po

wered up d

uring a cal

for heat (R-W/W1 c

losed) or

when (R

W/W1

opens)

dur

ing t

er on-del

per

iod.

LIMIT CIRCUIT LOCK

OUT – Lo

out

occurs if the

limit or flame rollout

itch

is open long

er than 3 minute

. Contr

will auto

-reset after 3

hour

. S

code

33.

Flame rollout

witch requi

res manual

reset.

IGNITION LOCK

OUT – System f

ailed to

ignite gas and

pro

flam

e in 4 attempts

Control will

auto-rese

t after 3 ho

. See

status code 34.

GAS HEA

TING LOCK

OUT –

rn off

wer and w

ait 5 minutes to r

etr

Chec

k f

tuc

k closed

gas v

alv

e rela

y on

control

wire or

shor

t to gas

alv

e wire

ABNORM

AL FLAME-

ING

SIGNAL

Flame is

pro

ed while

gas v

alv

e is de-

energiz

ed.

Inducer will r

un until

fault is

cleared.

Chec

k f

-S

tuc

k open or

leaky gas

PRESS

URE SWITCH D

ID NO

T OPEN

Chec

k f

bstr

ucted press

ure tube

ressur

e s

itch stuc

k closed.

SECOND

Y V

GE FUSE IS

OPEN

Chec

k f

hor

t circuit in secondar

y v

oltage

(24V) wir

ing including ther

mostat

leads

. Disconnect ther

mostat leads

to isolate shor

t circuit.

HIGH-HEA

T PRESSURE SWITCH OR

REL

DID

T CLOSE OR

REOPE

NED - Chec

k f

-C

ontrol rela

y ma

y be def

ectiv

as v

alv

e is mis

wired.

-S

ee status code

32.

-HEA

T PRESSURE SWIT

CH DI

T CLOSE OR

REOPENED – If open

longer than 5 mi

, inducer shuts off

for 15 minutes bef

ore retr

If opens

dur

ing b

er on-dela

y per

iod, b

will come

on f

or the se

lected

er off-

dela

Chec

k f

-P

roper v

ent sizing.

inducer v

oltage (115V).

-L

inlet gas

pressure

(if LGPS

used).

Inadequate comb

ustion air suppl

isconnected or obstr

ucted pressure

tubing.

ectiv

e inducer motor

-D

fectiv

e pressure s

witch.

xcessiv

e wind.

estr

icted v

ent.

LIMIT CIRCUIT F

– Indicates the

limit or flame rollo

ut s

witch is open.

er will r

un f

or 4 minutes or until

open s

witch remak

es whiche

er is

longer

. If open longer than 3 minutes

code changes to lo

out #13.

If open

less than 3 min.

status code #33

continues to flash unt

il b

er shuts off

Flame rol

lout s

witch requires manual

reset.

Chec

k f

-D

ty filter

or restr

icted duct

system.

Loose b

er wheel

-D

fectiv

e s

itch or co

nnections

ectiv

e b

low

er motor o

r capacitor

Inadequa

te comb

ustion air

suppl

(flame rollo

ut s

witch open).

estr

icted v

ent.

roper v

ent sizing.

xcessiv

e wind.

IGNITION

ING F

ILURE

– If flame

is not sen

sed dur

ing the t

rial f

or ignitio

per

iod, the

contr

will repe

at the

ignition

sequence 3 more times

bef

ore lo

out

#14 o

ccurs

. If flame sign

al is lost dur

ing

the b

er on-dela

y per

iod, b

er will

come on

for

the selected

er off-del

Chec

k the f

ollo

ing items

first bef

ore

proceeding to the n

xt step

-G

as v

alv

e tur

ned off

-M

anual shut-off v

alv

reen/

llo

wire MUST

connected

to fur

nace sheet metal

lame sensor must not

be grounde

deter

mine whether the prob

lem is in

the gas v

alv

, igniter

, or flame sensor

the system

can be operated in

the

compo

nen

t test mode

to chec

the ignite

First

remo

ther

mostat conn

ectio

from the control and in

itiate the

component test

sequence

. Does

the

igniter gl

orange/white b

y the

end of

the 15 second w

m-up per

iod?

-HEA

T PRESSUR

E SWITCH

OPEN

WHILE HIGH-HE

T PRESSURE

SWITCH IS CLOSED - Chec

k f

-heat

pressure

itch stuc

k ope

-D

isconnected or obstr

ucted pressure

tube

-M

wired pressure s

witches

-L

inlet

gas

pressure (if LGPS

used).

Unplug igniter har

ness from control and

initiate another compo

nent test sequence

Chec

k f

or 115V between pin 1 and

NEUTRAL-L2 on the co

ntrol.

as 115V

present f

or the 15 second per

iod?

Reconnect the R ther

mostat lead and set

ther

ostat

to call f

or heat.

Connect

ltmeter

across gas v

alv

e connections

. Does gas

e receiv

e 24V

Does gas

alv

e open

and all

gas to flo

Do the main b

ners ignite

Do the main b

ners sta

y on?

Repeat

call f

or heat and chec

k flame sensor

current dur

ing t

rial f

or ignition

per

iod.

Is the

DC microamps bel

0.5?

Clean flame

sens

or with fine

steel

wool and

rechec

k current.

Nominal

current is 4.0 to

6.0 microam

Fix

ed.

CONTR

OL CIRCUITR

Y LOCK

OUT A

to-

reset after 1 hour lo

out due to:

lame circuit f

ailure

as v

alv

e rela

y stuc

k open.

oftw

are chec

k error

Reset po

wer to clear lo

out.

Replace

control if code repeat

Replace fur

nace control

Chec

for

continuity in the

har

ness

and igniter

Replace def

ectiv

e component.

Chec

k connections

. If OK, replace contro

Chec

k that all gas v

alv

es are tur

ned on.

Replace v

alv

Chec

k f

Inadequa

te flame ca

er or rough

ignition.

inlet gas pressure

-P

roper fir

ing rate

Allo

w b

er to come

on and repeat te

st to

chec

k f

or inter

mittent operation.

Chec

k connectio

ns and retr

If current is

near typica

l v

alue (4.0-6.0 nomina

l) and

rners will not sta

on,

repeat

chec

k in hi

gh-

heat.

If b

ners will still not st

on replace

contr

ol.

rners

operate

in hi

gh-heat

then

itch

to l

-heat

, chec

k man

ifo

ld pr

essure

If OK, chec

k b

rner carr

yov

er and fla

sensor location.

YES

Replace el

ectrode

Is current

near typica

l v

alue?

Replace fur

nace control

Will main b

ners ignite

and sta

y on?

A05095

Printed in U.S.A.

Edition Date: 12/08

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: 58MTB---2SM

Replaces: 58MTB--- 1SM

58MTB