Rinnai COMBI i060C, Installation And Operation Manual, Page: 104 / 136

104 Rinnai I-Series Condensing Boiler Combi Manual
* See “Electrical Diagnostics” on Technical Data
No Code
The boiler does not operate with the
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.
No Code
Simultaneous DHW and CH is not
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.
No Code
Cannot change the DHW set point
temperature

When DHW is being produced,
the temperature setting can only
be adjusted between 98°F and
110°F.
No Code
Supply temperature is different
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.
No Code
Pump or fan even with no
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.