Rinnai RHE1S40N, Installation And Operation Manual, Page: 41 / 56

41
HE Series Infrared Gas Heater Installation and Operation Manual
28. TROUBLESHOOTING GUIDE
WARNING
Improper adjustment, alteration, service or maintenance can
cause property damage, injury or death. This heater must be
installed and serviced only by a trained gas service technician.
SET THERMOSTAT TO CALL FOR HEAT
APPLY 120 VOLTS - GREEN LIGHT
IS ON
•
CHECK 120V TO DSI AT “ L1 ”
•
CHECK 120V OUT AT “ IND ” FROM DSI TO BLOWER
COMBUSTION AIR BLOWER
STARTS
AIR PROVING SWITCH HAS
CLOSED 24 VOLTS IS PRESENT
AT “ PSW ” AT DSI CONTROL.
•
CHECK TUBING TO SWITCH IS CONNECTED
AND NOT BLOCKED OR KINKED
•
CHECK AIR PRESSURE WITH MANOMETER
•
CHECK FOR OBSTRUCTION IN THE AIR INTAKE
•
REPLACE DEFECTIVE BLOWER
•
CHECK INTEGRITY OF SWITCH
•
REPLACE DEFECTIVE SWITCH
•
CHECK DSI CONTROL FUSE FOR CONTINUITY
•
VISIBLY CHECK IF IGNITER IS SHORTING OUT
• CHECK GROUND WIRING
•
REMOVE AND INSPECT IGNITER AND LEAD
•
CHECK BOOT OF THE IGNITION CABLE FOR
SIGNS OF MELTING OR OVERHEATING
•
IF “ YES ” ... TAKE PROTECTIVE ACTION TO
SHIELD CABLE AND BOOT FROM EXCESSIVE
TEMPERATURE; REPLACE ANY DEFECTIVE
COMPONENT
•
CHECK CERAMIC INSULATOR AND CAP
•
CHECK SPARK GAP SETTING IS 3/16” (ADJUST
BY MOVING THE GROUND PRONG ONLY)
•
PERFORM IGNITION LEAD TEST (See SPARK
IGNITION CIRCUIT INSTRUCTIONS—Section 22)
•
GOOD SPARK.....REPLACE IGNITER
•
NO SPARK/OR WEAK.....REPLACE CONTROL
SPARK IGNITER / SENSOR
24V TO GAS VALVE - RED LIGHT
IS ON
CONTINUED
SEQUENCE OF EVENTS
NO
YES
YES
YES
NO
NO
•
REMEDY 120 VOLTS SUPPLY FAULT
NO
NO
•
FAULTY RELAY SWITCH IN DSI — RE-
PLACE DSI
BLOCKED FLUE SWITCH IS
CLOSED
24 VOLTS IS PRESENT AT “ TH ” AT
DSI CONTROL.
AMBER LIGHT IS ON
YES
NO
•
CHECK TUBING TO SWITCH IS CONNECTED
AND NOT BLOCKED OR KINKED
•
CHECK AIR PRESSURE WITH MANOMETER
•
CHECK INTEGRITY OF SWITCH
•
REPLACE DEFECTIVE SWITCH
•
CHECK FOR AND REMEDY ANY OBSTRUCTION
IN THE VENT / TUBE