Navien CH-180 Service manual - page 103
101
Check method
Error type
Cause
Check method
Remark
1. Check if there is leakage inside the boiler.
2. Check if there is leakage in the heat exchanger.
Select the trial mode (DIP S/W 2-2 ON), and if
drain continues through the condensed water
hose, the system determines the heat exchanger
defective.
gener-ated in the trial mode> Leakage No water refilling / delay Water pressure sense error Defect Unit, Leakage Defective the auto feeder valve Water pressure sense error Suspension PCB 1. If water is not refilled, check the filter in auto feeder valve. Check if water is not refilled or delayed due to clogging of the auto feeder valve. Drain heating water through the drain cork on the bottom of the pump, and try refilling again. 2. Check the operating voltage (120V). If power is supplied normally, replace the auto feeder valve. If power is not supplied, replace the PCB. Abnormal the Water pressure sensor. Abnormal display. Suspension of cold water supply or the cold water frozen. If the trouble continues despite the checking of above items, replace the PCB. G ©Navien America Inc. 2010 CH series service Manual Version 1.0