Troubleshooting - Rinnai 37AHA Series Training Manual

Troubleshooting

•
Power is supplied through the door switch. Account for this open circuit when performing
any electrical testing and or diagnostics with the door removed
•
Status LED—The PCB has a single status LED. It's flashing state indicates the following:
•
Slow flashing LED—normal operation
•
Fast flashing LED—the flow sensor is detecting less that 1 gpm entering the air
handler likely due to a significant domestic hot water demand. The pump and blower
(time delayed) will be off during this state.
•
Dip Switches —
Incorrect settings could cause blower to
cycle on/off improperly
Dip
Switches
Status
LED
Shunt
Jumper
Refer to the installation manual for the
following troubleshooting flow charts:
–
Start-Up and 'LED' Troubleshooting
–
Blower System 115V Troubleshooting
–
Circulating Pump 115V Troubleshooting
–
24V Troubleshooting
30
Rinnai Corporation Hydronic Air Handler 101 Training Manual
•
Shunt Jumper — Incorrect setting could
cause circulation pump to pulsate on and
off – "FS / WH" pin connections