Rinnai DDPCDEL, Operation & Installation Manual, Page: 32 / 36

Rinnai 32 Commercial Controller OM
DDPCDEL ERROR DETECTION
If the temperature returns to the set point, within a prescribed period of time, the controller will stop alternating to
the affected pump and continue to display a pump error. If the Ring-Main temperature drops below the set point
for a prescribed period of time while both pumps are operating simultaneously then the low temp error is displayed
however both pumps continue to operate. If the temperature recovers, within a prescribed time frame, then the
error is removed and the controller returns to normal operation. If the temperature continues to drop in excess of
10°C below the set point and does not recover for a prescribed period of time the controller will disable both pumps.
When operating in "AUTO" mode and the Ring-Main temperature drops below the set point for a prescribed period
of time then an error is displayed and the controller automatically switches to the alternative pump.
To view displayed errors
1. From home screen select "INFO" button 2.
1 2 3
4
SET INFO MAINT
RING MAIN
TEMPERATURE: 34
PUMP AUTO
Main temperature 5°C low error screen image.
1 2 3
4
SET INFO MAINT
RING MAIN
TEMPERATURE
ERROR
Pump 1 disabled screen.
1 2 3
4
OK
ERROR MAIN TEMP
5 deg. LOW
PUMP 1: DISABLED
Main temperature 10°C low error screen image.
1 2 3
4
CLEAR OK
ERROR MAIN TEMP
10 deg. LOW
PUMPS DISABLED
The controller has an additional inbuilt function to identify a thermistor error.
It will display an error when the thermistor values are outside the prescribed
range.
1 2 3
4
SET INFO MAINT
RING MAIN
TEMPERATURE
ERROR
To remove any of the errors select the
"CLEAR" button 1. followed by "CLEAR"
button 2.
1 2 3
4
CLEAR OK
THERMISTOR ERROR
RING OPEN
1 2 3
4
EXIT CLEAR
THERMISTOR ERROR
RING OPEN
DDPCDEL OPERATION