Rinnai 37AHA04508KA5 Installation, Operation And Maintenance Manual page 22

Installation
STEADY 'LED' FLASH
PUMP
ENERGIZED
NO
ADJUST THERMOSTAT SET
TEMPERATURE HIGHER THAN
ROOM TEMPERATURE
PUMP
ENERGIZED
CHECK FOR LOOSE OR BROKEN
WIRES
CHECK VOLTS ACROSS 'PUMP'
CONNECTIONS ON PCB
VAC = 115V +/-
PROBLEM(S) WITH 24V TO PCB
- GO TO 24V
TROUBLESHOOTING CHART
RECONNECT WIRES AND
CONFIRM THAT WIRING IS AS
PER WIRING DIAGRAMS
CONTACT TECH.
SUPPORT
Figure 22:
Circulating Pump 115V Troubleshooting - Flow Sensor (FS) Configuration
22
START
WITH DOOR SWITCH CLOSED
(SET SYSTEM IN HEATING MODE
-CALL FOR HEAT)
YES
IS 'LED' ON
YES
DRAW NORMAL
CHECK CAPACITOR; IF
DEFECTIVE, REPLACE
COMPONENT AND RE-CHECK
YES
NO
PUMP MOTOR
YES
CONNECT PUMP DIRECTLY TO
115 VAC POWER SUPPLY
NO
CHECK CAPACITOR; IF
DEFECTIVE REPLACE
COMPONENT AND RE-CHECK
YES
DRAW NORMAL
RETURN TO START
NO
Rinnai Corporation Hydronic Air Handler Manual
YES
RAPID 'LED' FLASH
NO
GO TO AHU START-UP &
'LED' TROUBLESHOOTING
YES
PUMP AMP
NO
AMP DRAW
REPLACE PUMP MOTOR AND
RETURN TO START
YES
(1) RECTIFY WIRING PROBLEM(S)
NO
ENERGIZED
REPLACE FAULTY COMPONENT(S)
NO
AMP DRAW
CHECK PUMP
MOTOR; IF
NO
DEFECTIVE
PUMP AMP
REPLACE
COMPONENT
AND RE-CHECK
AMP DRAW
SYSTEM
WORKING
YES
YES
FINISH
YES
PUMP AMP
DRAW NORMAL
NO
(2) CHECK MOTOR AND
CAPACITOR; IF DEFECTIVE,
RETURN TO START
PUMP AMP
DRAW NORMAL
YES
SYSTEM
WORKING
NO