Installation Guide

104 Rinnai I-Series Condensing Boiler Combi Manual
* See “Electrical Diagnoscs” on Technical Data
No Code
The boiler does not operate with the
CH seng buon
• If DIP switch 2 is OFF, CH
operaon will operate via the
room thermostat.
No Code DHW recirculaon does not begin
• Ensure the DHW recirculaon
pump is connected to the
DHW_Pump terminal.
• Ensure DIP switch 3 is ON.
• Ensure the DHW recirculaon
plumbing type is set properly per
Parameter 12.
• Ensure the DHW recirculaon
with mer relay input is set
properly per Parameter 13.
• Ensure the wiring to the external
mer is correct.
• Ensure the external mer is ON,
if in use.
• The recirculaon logic has an OFF
interval aer use.
No Code
Simultaneous DHW and CH is not
funconal
• Ensure DIP switch 4 is ON.
• If CH set point temperature is
lower than 140°F, it is not
permied (this includes outdoor
reset temperature sengs).
• Ensure the DHW inlet
temperature is not too hot.
• Ensure the heang 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 seng can only
be adjusted between 98°F and
110°F.
No Code
Supply temperature is dierent
from the seng temperature on
the controller
• During outdoor sensor control,
the supply temperature will
vary dependent on the
outdoor temperature.
• During simultaneous operaon
of DHW and CH, the supply
temperature for CH is based
on DHW control.
No Code CH capacity is insucient
• Ensure the parameters are
properly set for the
installaon.
• During simultaneous operaon
of DHW and CH, ow volume
to heang can be reduced.
No Code
Pump or fan even with no
demand
• The boiler may start or operate
the pump for freeze protecon
operaon.
• The pump may intermiently
operate to prevent it from
becoming stuck.
No Code Cannot turn o ECO mode
• During DHW recirculaon, ECO
switch will always be on.