Rheem 743 series Owner's Manual And Installation Instructions page 11

I. Error Codes
(Prog>Service>Accept>Error Codes)
This function allows easy identification of problems occurring with the unit by
service technicians.
Error
Hot Thermistor O/C, S/C
Cold Thermistor O/C, S/C
Triac S/C
Leak Detected
Expired Filter
Calibration Time Out
For Boiling Unit Display Temp mode
II.
(Prog>Service>Accept>Boiling Temp)
Display Shows: "XXX °C"
This function displays the current boiling water temperature.
Press the (Cancel) button to revert back to the main menu.
For Chiller Unit Display Temp mode
III.
(Prog>Service>Accept>Chiller Temp)
Display Shows: "XXX °C"
This function displays the current chilled water temperature.
Press the (Cancel) button to revert back to the main menu.
For Calibration Reset mode
IV.
Prog>Service>Accept>Calib.Reset>Accept)
Display Shows: "Calib. Reset"
This function recalibrates the boiling water unit to boiling point. Press the (Accept)
button to recalibrate the boiling point. Press (Accept) again at the "Are You
Sure?" prompt. Press the (Cancel) button to revert back to the Main menu. The
timer will now display "Calibrating Do Not Interrupt". When calibration is
complete the timer display will revert back to the main menu.
For Temp Override mode
V.
(Prog>Service>Accept>Temp Override>Accept)
This function allows the user to manually set the required boiling water
temperature.
Display Shows: "XX °C"
Press the (UP) button until the desired temperature is shown (range is from 70°C
to 99°C). Press the (Accept) button to activate the selection, then the words "Are
You Sure?" will flash on the screen. Press the (Accept) button to confirm your
selection. The words "Calibrating Do Not Interrupt" may appear for a short
period, this is the unit is checking that it is able to reach the temperature you
require. Once the unit has finished checking, the screen will return to normal.
To Display the Software Version
VI.
(Prog>Service>Accept>Software Version>Accept)
This displays both the Timer and Controller software versions. The top digits
relate to the timer software version, and the lower digits relate to the controller
software version.
Rheem New Zealand Ltd
Code
A Low Level Probe Fault
B High Level Probe Fault
C Compressor Fault
D Water Heating Fault
E Excessive Temperature Rise
G
11
Error
743 Series BWU Document #: 318489B
Code
H
J
K
L
N