Date:

8-4-2010

 

 

 

 

 

 

Revision:

 

0

 

 

 

 

 

 

Form:

 

2396

 

 

 

 

 

 

 

Code

Description

 

Recommended Troubleshooting of Lockout Codes

 

 

Code

122

Lightoff

rate

1.

Check wiring and correct any potential wiring errors.

 

 

L

 

proving failed

2.

Check VFDs ability to change speeds.

 

 

 

123

Purge

 

rate

proving

3.

Change the VFD

 

 

L

 

failed

 

 

 

4.

If the fault persists, replace the module.

 

 

 

 

 

 

 

 

 

 

 

 

 

124

High

 

fire

switch

1.

Check wiring and correct any potential wiring errors.

 

 

H

 

OFF

 

 

 

2. Check High Fire Switch to assure proper function (not welded

 

125

High

 

fire

switch

or jumpered).

 

 

H

 

stuck ON

 

3. Manually drive the motor to the High Fire position and adjust

 

 

126

Low

 

fire

switch

the HF switch while in this position and verify voltage through

 

H

 

OFF

 

 

 

the switch to the HFS input with a voltmeter.

 

 

 

127

Low

 

fire

switch

4.

If steps 1-3 are correct and the fault persists, replace the

 

H or L

 

stuck ON

 

module.

 

 

 

128

Fan

speed

failed

1.

Check wiring and correct any potential wiring errors.

 

 

H or L

 

during prepurge

2.

Check VFDs ability to change speeds.

 

 

 

129

Fan

speed

failed

3.

Change the VFD

 

 

H or L

 

during preignition

4.

If the fault persists, replace the module.

 

 

 

130

Fan

speed

failed

 

 

 

 

H or L

 

during ignition

 

 

 

 

 

131

Fan

 

movement

 

 

 

 

H

 

detected

during

 

 

 

 

 

 

standby

 

 

 

 

 

 

132

Fan

speed

failed

 

 

 

 

H

 

during run

 

 

 

 

 

 

133-

RESERVED

 

 

 

 

 

 

135

 

 

 

 

 

 

 

 

 

136

Interrupted

Airflow

1.

Check wiring and correct any possible wiring errors.

 

 

H

 

Switch

failed to

2.

Check Interrupted Airflow switch(es) to assure proper

 

 

 

close

 

 

 

function.

 

 

 

 

 

 

 

 

3.

Verify voltage through the airflow switch to the IAS input with

 

 

 

 

 

 

 

a voltmeter.

 

 

 

 

 

 

 

 

4.

If steps 1-3 are correct and the fault persists, replace the

 

 

 

 

 

 

 

module.

 

 

 

137

ILK failed to close

1.

Check wiring and correct any possible shorts.

 

 

H

 

 

 

 

 

2.

Check Interlock (ILK) switches to assure proper function.

 

 

 

 

 

 

 

 

3. Verify voltage through the interlock string to the interlock input

 

 

 

 

 

 

with a voltmeter.

 

 

 

 

 

 

 

 

4.

If steps 1-3 are correct and the fault persists, replace the

 

 

 

 

 

 

 

module.

 

 

 

138-

RESERVED

 

 

 

 

 

 

148

 

 

 

 

 

 

 

 

 

 

FAULT

CODES

 

 

 

 

 

 

149

 

THROUGH

 

 

 

 

 

 

165

ARE

OEM

 

 

 

 

 

 

SPECIFIC

FAULT

 

 

 

 

 

 

CODES.

 

 

 

 

 

 

149

Flame detected

OEM Specific

 

 

H or L

 

 

 

 

 

1.

Holds if flame detected during Safe Start check up to Flame

 

 

 

 

 

 

 

Establishing period.

 

 

 

150

Flame not detected

OEM Specific

 

 

H

 

 

 

 

 

1.

Sequence returns to standby and restarts sequence at the

 

 

 

 

 

 

 

beginning of Purge after the HF switch opens. if flame detected

 

 

 

 

 

 

 

during Safe Start check up to Flame Establishing period.

 

 

 

151

High fire switch ON

OEM Specific

 

 

H or L

 

 

 

 

 

 

44

 

 

 

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Bryan Boilers & 300, Triple-Flex 150, 250, 200 service manual Off, Through, Are OEM Specific Fault Codes