Rinnai CX199i Installation And Operation Manual page 76

Water Flow Control
65
•
Measure resistance or voltage
values of the water flow control.*
•
The water flow control valve has
failed to close during the bath fill
function. Immediately turn off the
water and discontinue the bath fill
function. Contact a trained and
qualified professional to service the
appliance.
Bypass Servo
66
•
Measure the resistance values and
voltage of the bypass servo valve.*
•
Ensure the harness and connector
are not wet.
•
If the voltage from the PC Board is
abnormal, replace the PC board;
otherwise replace the bypass servo
valve.
PC Board
70
•
Replace PC Board
Solenoid Valve Circuit
71
•
Ensure dip switch on PC board is in
the OFF position.
•
Ensure gas control wire is not loose
or damaged.
•
Ensure heater circuit is not
grounded.
•
Replace PC Board.
•
Check flame rod and wire for
damage.
•
Verify HEX is not leaking.
•
Please call Rinnai Technical
Support.
Flame Rod
72
•
Check flame rod and wire for
damage.
•
Verify HEX is not leaking.
•
Please call Rinnai Technical
Support.
LC
Scale Build-up in Heat Exchanger
(when checking maintenance code
history, "00" is substituted for "LC")
•
LC indicates that there is scale build
up in the heat exchanger and that
the heat exchanger needs to be
flushed to prevent damage. Refer to
section "6.3 Flushing the Heat
Exchanger" for more information.
Hard water must be treated to
prevent scale build up or damage to
the heat exchanger.
•
After flushing, reset LC code as
instructed.
•
Please call Rinnai technical
department.
•
To reset the LC code temporarily,
push the "On/Off" button on the
temperature controller five times in
five seconds.
76
FF
SS
* See "Electrical Diagnostics" on Technical
Data Sheet located on inside front cover of
water heater.
Visit rinnaipro.myabsorb.com for additional
troubleshooting resources.
Rinnai Tankless Water Heater Installation and Operation Manual
Maintenance Indicator
•
Placeholder in Diagnostic code
history indicating that a service
provider performed maintenance or
service.
•
Enter this code after performing
service by pressing the up and
down arrow buttons and On/Off
simultaneously.
•
FF is visible on the monitor.
FF
Figure 81
(SS)
Service Soon
•
SS is a time-based service indicator
set during installation. See section
"4.13 Configure Parameter
Settings" for additional details on
setting and changing the SS
indicator.
•
SS indicates that it is time for
service.
•
To reset the SS code, press and
hold the "A" button until SS
disappears.
NO CODE - Nothing happens when
water flow is activated
•
Verify you have at least the
minimum flow rate required to fire
unit.
•
Measure the resistance or voltage
of the water flow control sensor.*
•
Clean inlet water supply filter.
•
On new installations ensure hot and
cold water lines are not reversed.