Rapid Engineering CTHN-100 Installation & operation manual - page 85

SECTION 18: T

ROUBLESHOOTING

79 of 91

R

e

place pr

essur

e

 s

w

itch.

(P/

N

 9043670

1)

R

eplace ignition module

.

(P/

N

 90434002K)

Ye

s

Re

m

o

v

e o

b

str

uction.

Is the 

v

ent pipe or the 

inlet of the 

b

ur

ner 

o

b

str

uct

ed?

Is the ignit

er g

a

p

set at 1/

8

"?

Unplug 

b

ur

ner and chec

k 

ignit

er and ignition w

ir

e

. 

Ar

e the

y damaged?

R

epair

, r

eplace or 

tight

e

n

hoses as necessar

y.

Ar

e the air hoses t

o

 the 

pr

essur

e

 s

w

itch secur

e

and leak fr

ee?

C

a

refull

y

 r

eset spar

k

g

ap t

o

 1/

8

".

R

eplace ignit

er and 

ignition w

ir

e

 as needed.

Chec

k 

v

acuum 

dif

fe

rential r

eading

. Is it 

ok

a

y

?

R

eset damper

s

R

emo

v

e the 

b

lue and 

y

ello

w w

ir

es fr

om the 

tr

ansf

or

mer

. Is ther

e

 24 

V

at the tr

ansf

o

rm

er 

secondar

y

?

W

ith the 

b

lue and y

ello

w 

w

ir

es still r

e

mo

v

ed, is 

the 

v

olt

age at the 

tr

ansf

or

mer 

b

lac

k and 

whit

e leads 1

2

0

V

?

Chec

k w

ir

ing 

b

et

w

e

en 

the po

w

er cor

d

 and 

tr

ansf

or

mer

.

R

econnect tr

ansf

or

mer 

w

ir

e

s

. Place a jumper 

w

ir

e

 acr

oss the pr

essur

e 

s

w

itch.

 Is ther

e a spar

k?

R

eplace tr

ansf

or

mer

.

(P/

N

 90436900)

Ye

s

Y

e

s

N

o

N

o

N

o

N

o

N

o

N

o

N

o

Ye

s

Y

e

s

Ye

s

N

o

N

o

Ye

s

Ye

s

Ye

s

Ye

s

Is ther

e spar

k

 at the 

ignit

er?

Ye

s