Rinnai I Series Installation And Operation Manual page 104

The boiler does not operate with the
No Code
CH setting button
•
If DIP switch 2 is OFF, CH
operation will operate via the
room thermostat.
No Code DHW recirculation does not begin
•
Ensure the DHW recirculation
pump is connected to the
DHW_Pump terminal.
•
Ensure DIP switch 3 is ON.
•
Ensure the DHW recirculation
plumbing type is set properly per
Parameter 12.
•
Ensure the DHW recirculation
with timer relay input is set
properly per Parameter 13.
•
Ensure the wiring to the external
timer is correct.
•
Ensure the external timer is ON,
if in use.
•
The recirculation logic has an OFF
interval after use.
Simultaneous DHW and CH is not
No Code
functional
•
Ensure DIP switch 4 is ON.
•
If CH set point temperature is
lower than 140°F, it is not
permitted (this includes outdoor
reset temperature settings).
•
Ensure the DHW inlet
temperature is not too hot.
•
Ensure the heating load for DHW
and CH are within limits to
handle both simultaneously.
Cannot change the DHW set point
No Code
temperature
•
When DHW is being produced,
the temperature setting can only
be adjusted between 98°F and
110°F.
104
Supply temperature is different
No Code from the setting temperature on
the controller
•
During outdoor sensor control,
the supply temperature will
vary dependent on the
outdoor temperature.
•
During simultaneous operation
of DHW and CH, the supply
temperature for CH is based
on DHW control.
No Code CH capacity is insufficient
•
Ensure the parameters are
properly set for the
installation.
•
During simultaneous operation
of DHW and CH, flow volume
to heating can be reduced.
Pump or fan even with no
No Code
demand
•
The boiler may start or operate
the pump for freeze protection
operation.
•
The pump may intermittently
operate to prevent it from
becoming stuck.
No Code Cannot turn off ECO mode
•
During DHW recirculation, ECO
switch will always be on.
* See "Electrical Diagnostics" on Technical Data
Rinnai I-Series Condensing Boiler Combi Manual