CODE

DESCRIPTION

RECOMMENDED TROUBLESHOOTING OF

NOTE

 

 

 

LOCKOUT CODES

 

164

Block intake ON

OEM Specific

L

 

 

1.

Check wiring and correct any errors.

 

165

Block intake OFF

L

2.

Inspect the Block Intake Switch to make sure it is

 

 

 

 

 

 

working correctly.

 

 

 

3.

Reset and sequence the module.

 

 

 

4.

During Standby and Purge, measure the voltage

 

 

 

 

across the switch. Supply voltage should

 

 

 

 

be present. If not, the Block Intake Switch is

 

 

 

 

defective and needs replacing.

 

 

 

5.

If the fault persists, replace the relay module.

 

166-171

RESERVED

 

 

 

 

Feedback

 

 

 

172

Main relay feedback incorrect

Internal Fault.

L

 

 

1.

Reset Module.

 

173

Pilot relay feedback incorrect

L

2.

If fault repeats, replace module.

174

Safety relay feedback incorrect

L

 

 

175

Safety relay open

 

 

L

176

Main relay ON at safe start check

 

 

L

177

Pilot relay ON at safe start check

 

 

L

178

Safety relay ON at safe start check

 

 

L

179-183

RESERVED

 

 

 

 

Parameter Faults

 

 

 

184

Invalid BLOWER/HSI output setting

1.

Return to Configuration mode and recheck

L

185

Invalid Delta T limit enable setting

 

selected parameters, reverify and reset module.

L

2.

If fault repeats, verify electrical grounding.

186

Invalid Delta T limit response setting

L

3.

If fault repeats, replace module.

187

Invalid DHW high limit enable setting

 

 

L

188

Invalid DHW high limit response setting

 

 

L

189

Invalid Flame sensor type setting

 

 

L

190

Invalid interrupted air switch enable setting

 

 

L

191

Invalid interrupted air switch start check enable

 

 

L

 

setting

 

 

 

192

Invalid igniter on during setting

 

 

L

193

Invalid ignite failure delay setting

 

 

L

194

Invalid ignite failure response setting

1.

Return to Configuration mode and recheck

L

 

 

 

selected parameters, reverify and reset module.

 

195

Invalid ignite failure retries setting

 

L

2.

If fault repeats, verify electrical grounding.

196

Invalid ignition source setting

L

3.

If fault repeats, replace module.

197

Invalid interlock open response setting

 

 

L

198

Invalid interlock start check setting

 

 

L

199

Invalid LCI enable setting

 

 

L

200

Invalid lightoff rate setting

 

 

L

201

Invalid lightoff rate proving setting

 

 

L

202

Invalid Main Flame Establishing Period time

 

 

L

203

Invalid MFEP flame failure response setting

 

 

L

204

Invalid NTC sensor type setting

 

 

L

205

Invalid Outlet high limit response setting

 

 

L

206

Invalid Pilot Flame Establishing Period setting

 

 

L

207

Invalid PII enable setting

 

 

L

208

Invalid pilot test hold setting

 

 

L

209

Invalid Pilot type setting

 

 

L

210

Invalid Postpurge time setting

 

 

L

211

Invalid Power up with lockout setting

 

 

L

67

Page 67
Image 67
A.O. Smith 2000, 3400, 2600, 1700 instruction manual Code Description Recommended Troubleshooting Lockout Codes

3400, 1700, 2000, 2600 specifications

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