Temperature Options Without A Temperature Controller; Setting Controller To Mute; Diagnostic Codes - Rinnai c199i Installation And Operation Manual

Temperature Options Without a Temperature Controller

The default temperature setting for this appliance installed without a temperature controller is 120° F (49° C).
Default: SW5 is OFF and SW6 is ON in DIPSW1. If desired, the temperature setting can be changed to 140° F (60°
C) by setting SW5 ON and SW6 OFF in DIPSW1.

Setting Controller to Mute

On the MC-91-2 to eliminate the beeps when keys are pressed or to turn the beeps back on, press and hold both
the up and down buttons until a beep is heard (approximately 5 seconds).
Locking the Controller
The MC-91-2 controller can be locked by pressing the Priority button and the up button together for 5 seconds.
A beep will sound confirming that the controller is locked. The display will alternately show "LOC", the
temperature setting, and a diagnostic code if one has been activated. All of the controllers in the system are
also locked.
To unlock the controller press the Priority button and the up button together for 5 seconds.

Diagnostic Codes

This water heater is designed to display diagnostic codes. If there is a potential operation concern refer to the
code and remedy on the next page.
To Display Diagnostic Information
To display the most recent diagnostic information code press and hold the "On/Off" button for 2 seconds on the
MC-91-2 controller. While holding the "On/Off" button press the up button. The last 9 diagnostic codes will
flash one after the other. To exit this mode press the "On/Off" and up button as before.
To enter or exit the maintenance monitor information mode, press and hold the down button for 2 seconds and
without releasing it press the ON/OFF button.
To obtain the water flow rate: press the up or down buttons until "01" displays. The water flow rate will then
appear. For example "58" means 5.8 gal/min.
To obtain the outgoing water temperature press the up or down buttons until "02" displays. The temperature
will appear in degrees Fahrenheit.
No.
60
Data
01 Water flow rate
02 Outgoing water temperature
Unit
0.1 gal/min
Degrees Fahrenheit
C199 Manual