Navien CH-180 Service Manual

Also see for CH-180: Owner's operation manual User's operation manual Installation manual Operation manual Installation manual

Contents

Navien CH-180 Service Manual Manual pdf 77 page image

75Error conditions and Symptoms Analysis5.10. 09ErrorError DescriptionThe system checks the RPM signal after the blower starts to run, and displays theerror message 09E in the following cases:1. If the RPM signal is 400 or lower at pre- purge, the system repeats pre-purge 10times. If the RPM remains 400 or lower, the system determines RPM error, andthe boiler switches into Lock-Out (gas valve and ignition transformer locked).(However, the air volume sen-sor should be normal.)2. If the RPM signal of 400 or lower is detected for 3 seconds during combustion,the system stops combustion, and the boiler switches into Lock-Out. (However,the air volume sensor should be normal.)3. If the pre-purge RPM signal of 400 or lower is detected, and the voltage of the airvol-ume sensor is lower than the standard voltage (ignition voltage), the systemdetermines RPM error, and the boiler switches into Lock-Out.1. Check if the blower works normally. If it does not work normally, check the powersupply to the blower (Black + Red, approx. DC 180V).2. Replace the PCB if there is a problem in power supply.3. If the trouble continues despite the checking of above items, replace the blower.4. If RPM is significantly low while the blower works and the power supply isnormal, replace the blower.5. If the blower connector is wet due to any reason including leakage, take thecorrective action.6. Check for loose connection of white tower on PCB09EFan MotorRPM errorCheckitems©Navien America Inc. 2010 CH series service Manual Version 1.0