A.O. Smith 3400 - Manual (Page 69)

69
CODE DESCRIPTION
191 Lead Lag base load common setting was invalid
192 Lead Lag DHW demand switch setting was
193 Lead Lag Mix demand switch setting was invalid
194 Lead Lag modulation sensor setting was invalid
195 Lead Lag backup modulation sensor setting was
invalid
196 Lead Lag slave mode setting was invalid
197 Lead Lag rate allocation setting was invalid
198 Lead selection setting was invalid
199 Lag selection setting was invalid
200 Lead Lag slave return setting was invalid
201 Lead Lag add stage method setting was invalid
202 STAT may not be a Lead Lag CH demand source
when Remote Stat is enabled
203 Lead Lag base load rate setting was invalid
Lead Lag Operation Faults
204 Lead Lag master was suspended due to fault
205 Lead Lag slave was suspended due to fault
206 Lead Lag header temperature was invalid
207 Lead Lag was suspended due to no enabled
Program Module installed
208 Lead Lag slave session has timed out
209 Too many Lead Lag slaves were detected
210 Lead Lag slave was discovered
211 Incompatible Lead Lag slave was discovered
212 No base load rate was set for Lead Lag slave
213 Lead Lag slave unable to fire before demand to
fire delay expired
214 Adding Lead Lag slave aborted due to add
requirement change
215 No Lead Lag slaves available to service demand
216 No Lead Lag active service was set due to
demand priority conflicts
217 No Lead Lag add stage method was specified
218 No Lead Lag drop stage method was specified
219 Using backup lead lag header sensor due to
sensor failure
Frost Protection Faults
220 Lead Lag frost protection rate was invalid
221 Lead Lag drop stage method setting was invalid
222 CH frost protection temperature was invalid
223 CH frost protection inlet temperature was invalid
224 DHW frost protection temperature was invalid
225-226 RESERVED
227
DHW priority override time was not derated due to
invalid outdoor temperature
228 Warm weather shutdown was not checked due to
invalid outdoor temperature
229 Lead Lag slave communication timeout
230 RESERVED
CODE DESCRIPTION
152 Minimum water temperature parameter was
greater than time of day setpoint
153 Minimum pressure parameter was greater than
setpoint
154 Minimum pressure parameter was greater than
time of day setpoint
155 CH modulation rate source parameter was invalid
156 Steam modulation rate source parameter was
invalid
DHW Parameter Errors
157 DHW demand source was invalid
158 DHW P-gain was invalid
159 DHW I-gain was invalid
160 DHW D-gain was invalid
161 DHW OFF hysteresis was invalid
162 DHW ON hysteresis was invalid
163 DHW hysteresis step time was invalid
164 DHW sensor type was invalid
165 Inlet sensor type was invalid for DHW
166 Outlet sensor type was invalid for DHW
167 DHW Storage OFF hysteresis was invalid
168 DHW Storage ON hysteresis was invalid
169 DHW modulation sensor type was invalid
170 DHW modulation sensor was not compatible for
AUTO mode
DHW Operation Faults
171 DHW control was suspended due to fault
172 DHW temperature was invalid
173 DHW inlet temperature was invalid
174 DHW outlet temperature was invalid
175 DHW high limit must be disabled for AUTO mode
176 DHW sensor type was not compatible for AUTO
mode
177 DHW priority source setting was invalid
178 DHW priority method setting was invalid
CH Operation Faults (continued)
179 CH S5 (J8 terminal 11) sensor was invalid
180 CH inlet temperature was invalid
181 CH S10 (J10 terminal 7) sensor was invalid
182 Lead Lag CH setpoint source was invalid
Lead Lag Parameter errors
183 Lead Lag P-gain was invalid
184 Lead Lag I-gain was invalid
185 Lead Lag D-gain was invalid
186 Lead Lag OFF hysteresis was invalid
187 Lead Lag ON hysteresis was invalid
188 Lead Lag slave enable was invalid
189 Lead Lag hysteresis step time was invalid
190 No Lead lag Modbus port was assigned