Lochinvar 1.5 - Manual (Page 20)

20
ModBus Instructions
Lockout Codes Description
192 = Outlet Sensor Short
193 = Outlet Sensor Open
201 = Internal Error
204 = Internal Error
205 = Parameters Programmed
206 = Error while programming Parameters
207 = Internal Error
228 = Pre-Mix Sensors Temperature Differential Too High
229 = Flame Failure 2
230 = Small Fan Speed Low
231 = Small Fan Speed High
232 = Flame Failure 1
233 = Ignition Failure
236 = Flue Damper Open
235 = Small Blower Proving Switch Not Open
236 = Small Blower Proving Switch Not Closed
238 = Air Pressure Switch Open
239 = Flame 1 Out of Sequence
240 = External Manual Reset High Limit
241 = Flame 2 Out of Sequence
244 = Large Gas Valve Relay Failure
245 = Small Gas Valve Relay Failure
246 = Internal Manual Reset High Limit
247 = High Flue Temperature
253 = High Combustion Air Temperature
254 = Display Fault
6
Troubleshooting