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IV'3' TROUBLESHOOTING (continued) <br />P11 <br />b Open circuit inthe liquid sensor circuit. Check all connections for wiring con- <br />tinuity xvith an ohm meter check for very high resistance or open. |fthere are <br />more than one liquid sensing circuit in the system it might be possible to <br />exchange parts to localize the failure to one area. Replaceable parts are the sen- <br />sor,aennorhomerunoab|e`zeneraafetybenimr, and channel PCcard. After the <br />malfunction has been located or if further help is needed to locate the problem <br />contact the installer, authorized repair center oryour local service agent. <br />0NOTE:/fthe channel has noliquid sensor connected, then install ajumper wire <br />between the mother board terminal marked BLUE and the ground terminal. See <br />Section 111.5., Page 20 for information on sensor wiring.) <br />Possible causes and remedies: <br />a. Sensor wire grounded. Check tosee if the BLUE wire from the mother board to <br />the safety barrier orterminal no 7 is mistakenly grounded. Remove incorrect <br />ground and retest the system. See Section ///.5,Page 16\2[l21for information <br />onsensor wiring. <br />tz Channel PC card failure. If none of the above malfunctions were found then the <br />problem might be in the channel PC card. If there is another channel card in the <br />system, exchange the questionable card with aworking card. |fneeded, contact <br />the installer, authorized repair center orour local service agent for replacement <br />or further help. <br />KM <br />