Fault Isolation Codes - Rinnai RHFE-551FA Service Manual

Fault Isolation Codes

Analog
Digital
Indicator
LED
Light
LO-HI PF -- Power Failure
:--
60 11 Missed Ignition Flame rod current
LO 12 Flame Failure
68 14 Overheat Safety
HI 16
Temperature
72 76 31
Temperature
Thermistor
Disconnection
76 80 32
temperature
thermistor short
Name Definition
Electric power has
been lost while the
appliance was running
does not reach 1.0
microamp within a
certain time after the
solenoid opens.
Flame rod current
remains below 1.0
microamp for 3
seconds during initial
combustion
High limit temperature
Device thermistor or thermal
fuse has activated
Over Room temperature is
above 104ºF for
Cut Off longer than 10
minutes
Room Room temperature
thermistor circuit is
open
Room Room temperature
thermistor wire is
trapped or touching
circuit bare metal.
Rinnai Direct Vent Service Manual
Corrective Action
Check that the power cord is firmly inserted into
the electrical outlet.
Check the 3 amp fuse.
Check whether the fuse or breaker has blown at
Check that the flame rod is firmly positioned.
Check the flame rod lead.
Check the flame rod for carbon build up.
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that there are no leaks in the gas supply
line or appliance.
Check for air in the gas supply.
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that there are no leaks in the gas supply
line or appliance.
Check for air in the gas supply.
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that the flue terminal is not blocked.
Check that the air filter is not blocked.
Check that the warm air flow is not blocked.
(There should be a clearance of 40 inches in front
of the appliance.)
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that the flue terminal is not blocked.
Check that the air filter is not blocked.
Check that the warm air flow is not blocked.
(There should be a clearance of 40 inches in front
of the appliance.)
Check the circuit. (troubleshooting)
Check the circuit. (troubleshooting)
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