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Bryan Boilers Triple-Flex High Efficiency Boilers & 300 User Manual

Page 50

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Date:

8-4-2010

Revision: 0

Form:

2396

44

Code Description

Recommended

Troubleshooting of Lockout Codes

Code

122 Lightoff

rate

proving failed

L

123

Purge rate proving
failed

1. Check wiring and correct any potential wiring errors.
2. Check VFDs ability to change speeds.
3. Change the VFD
4. If the fault persists, replace the module.

L

124 High

fire

switch

OFF

H

125 High

fire

switch

stuck ON

H

126 Low

fire

switch

OFF

H

127 Low

fire

switch

stuck ON

1. Check wiring and correct any potential wiring errors.
2. Check High Fire Switch to assure proper function (not welded
or jumpered).
3. Manually drive the motor to the High Fire position and adjust
the HF switch while in this position and verify voltage through
the switch to the HFS input with a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the
module.

H or L

128 Fan speed failed

during prepurge

H or L

129 Fan speed failed

during preignition

H or L

130 Fan speed failed

during ignition

H or L

131 Fan movement

detected during
standby

H

132 Fan speed failed

during run

H

133-
135

RESERVED

1. Check wiring and correct any potential wiring errors.
2. Check VFDs ability to change speeds.
3. Change the VFD
4. If the fault persists, replace the module.

136 Interrupted

Airflow

Switch failed to
close

1. Check wiring and correct any possible wiring errors.
2. Check Interrupted Airflow switch(es) to assure proper
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.

H

137

ILK failed to close

1. Check wiring and correct any possible shorts.
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.

H

138-
148

RESERVED

FAULT

CODES

149 THROUGH
165 ARE OEM
SPECIFIC FAULT
CODES.

149

Flame detected

OEM Specific
1. Holds if flame detected during Safe Start check up to Flame
Establishing period.

H or L

150

Flame not detected OEM Specific

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.

H

151

High fire switch ON OEM Specific

H or L