31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If open longer than
five minutes, inducer shuts off for 15 minutes before retry. Check for:
- Excessive wind - Proper vent sizing - Defective inducer motor
- Low inducer voltage (115VAC) - Defective pressure switch
- Inadequate combustion air supply - Restricted vent
- Disconnected or obstructed pressure tubing
- Low inlet gas pressure (if LGPS used)
If it opens during blower on-delay period, blower will come on for the selected
blower off-delay.
查了一下故障表，Pressure Switch坏的可能性很大， 先看看Vent的情况，堵没堵。启动后 Inducer Fan 转吗，然后 短路Pressure Switch看看怎么样？就能判断出是不是PressureSwitch的问题。