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TROUBLESHOOTING IGNITION SYSTEM The control system has several features to aid in troubleshooting problems which may occur during operation. If a fault occurs, the Display Board contains sixteen (16) red fault LED indicators to help pinpoint the source of failures. In addition, the display will inform the user on which stage the failure occurred by illuminating a red Stage LED. In cases where the problem persists to lockout, the appropriate red LEDs will remain illuminated and a three digit error code will flash on the display screen. A summary of error codes is given in table 19. The error codes are broken into two categories: hard lockouts and soft lockout. Hard Lockouts: Hard lockouts require a manual reset accomplished by pressing the Enter/Reset push-button on the Display Board. Cycling the power "OFF" and "ON" will not reset the control. Soft Lockouts: Soft Lockouts also require a manual reset accomplished by pressing the Enter/Reset push-button on the display board. However, under a soft lockout condition, the control will re-initiate an ignition process after one (1) hour provided the call-for-heat is still present and will continue every hour until the unit is either reset or ignites. A description of the red fault LEDs and their corresponding functions are as follows. LED Controller Function Blocked Flue Indicates a blockage or interference at the appliance flue. Temp. Probe Fail Indicates failure at one of the temperature probes. Unit will "lock-out" only if controlling probe fails. Insufficient Air Indicates air pressure was too low to create a sufficient differential to close the differential pressure switch. Circulate Fail Indicates water flow was too low to close the flow switch. Gas Valve Fail Monitors Gas Valve relay output. LED is ON when the output relay supplying power to the gas valve(s) is open. High Limit Monitors ECO in the Outlet Temperature probe. LED is ON when the ECO is open. Flame Fail Monitors the Flame Sense Rod. LED is ON when a signal from the flame rod is not sufficient to indicate flame. Igniter Fail Indicates igniter current was too low to meet minimum value which allows trial for ignition to continue. Low Gas Fail Inlet gas pressure is not sufficient to close gas pressure switch. High Gas Fail* Manifold gas pressure is has exceeded designed maximum value. LWCO Fail* Indicates water level in system is too low for safe operation. Power Vent Fail* Air pressure at Power Vent Switch is not sufficient for safe operation. *Optional Equipment - LEDs will illuminate only if equipment isconnected to boiler. Upon lockout, manually push the ENTER/RESET button on thedisplay panel to restart the boiler. Verify proper operation after servicing. 33 Table 19. Error Code Chart GENESIS II CONTROL - FAULT OPERATION FAULT ERROR CODES LOCKOUT COMMUNICATIONS FAULT (CCB TO ICB) STAGE 1: 001 HARD STAGE 2: 002 HARD STAGE 3: 003 HARD STAGE 4: 004 HARD ECO/HIGH LIMIT: 010 HARD NO GAS VALVE POWER SENSED STAGE 1: 011 HARD STAGE 2: 012 HARD STAGE 3: 013 HARD STAGE 4: 014 HARD LWCO 020 HARD CIRCULATE FAULT (FLOW SWITCH) 030 SOFT INSUFFICIENT AIR (AIR PRESSURE SWITCH) STAGE 1: 041 SOFT STAGE 2: 042 SOFT STAGE 3: 043 SOFT STAGE 4: 044 SOFT BLOCKED FLUE 060 SOFT POWER VENT 070 SOFT IGNITER FAILURE STAGE 1: 081 HARD STAGE 2: 082 HARD STAGE 3: 083 HARD STAGE 4: 084 HARD LOW GAS FAILURE 090 HARD HIGH GAS FAILURE STAGE 1: 101 HARD STAGE 2: 102 HARD STAGE 3: 103 HARD STAGE 4: 104 HARD GAS VALVE RELAY FAILURE STAGE 1: 111 HARD STAGE 2: 112 HARD STAGE 3: 113 HARD STAGE 4: 114 HARD FLAME FAILURE STAGE 1: 121 HARD STAGE 2: 122 HARD STAGE 3: 123 HARD STAGE 4: 124 HARD PROBE FAULTS OUTLET PROBE 131 HARD INLET PROBE 132 HARD REMOTE PROBE 133 HARD IRI GAS VALVE FAILURE 140 HARD CPU FAULT 210 HARD For additional information please refer to the User’s Manual supplied with the boiler or contact: A.O. Smith Technical Services 7 a.m. to 7 p.m. Central Time at: 1-800-527-1953 Our Internet Site is another source of information 24 hours a day. 34 NEW BOILER LIMITED WARRANTY A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this hydronic boiler: 1. If within TEN years after initial installation of the boiler, the heat exchanger shall prove upon examination by the warrantor to be defective in materialor workmanship, the warrantor, at his option, will exchange or repair such part or portion. This term is reduced to FIVE years if this boiler is used for volume hot water supply purposes other than hydronic space heating. a. This warranty is extended to the owner for all other parts or portion during the FIRST year following initial installation of this boiler. b. The warranty on the repair or replacement of the part or portion will be limited to the unexpired term of the original warranty. 2. CONDITIONS AND EXCEPTIONS This warranty shall apply only when the boiler is installed in accordance with local plumbing and building codes, ordinances and regulations, thep...

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