How To Use Timer Setting Panel; How To Operate; 7-Segment Display; Current Time Setting - Sanden GAU-A45HPA Service Book

10. How to Use Timer Setting Panel

1. How to Operate

1-1 7-Segment Display

7-segment display on the timer setting panel ordinary displays the current time as a
function of the Clock Display Mode. However, the display is switched to the Display
Sleep Mode and turns off when no panel operation is performed for more than 60
seconds. Display Sleep Mode is cancelled when either of “"UP”", “"DOWN”" or “"Func/Enter”"
key is pressed. When an error is occurred, a red LED on the timer setting panel turns on
and an error code is displayed on the 7-segment LED display. The panel does not turn
to the Display Sleep Mode while the error code is shown.

1-2 Current Time Setting

This product contains a built-in clock IC. As a part of the water heating cycle logic
refers to the current time, it is necessary to set the clock before start using the product.
The Current time can be set in the Clock Setting Mode as described below.
*Note
There is no need to adjust the time setting for the daylight saving period. Even if the installation is
conducted during the daylight saving period, the clock setting to the ordinary time (not daylight
saving time) is preferable.
1. Switching to Clock Setting Mode
Press the “"Enter”" key in the Clock Display Mode to switch to the Clock Setting Mode. Time Display
starts flashing once the mode is switched.
2. Setting the Clock
The time setting can be adjusted by pressing “"Up”" and “"Down”" keys. Fast forward and rewind are
available by pressing and holding down a key.
3. Executing Setting the Clock
After the clock is adjusted to the current time, press the Enter key to execute the setting. The time
display stops flashing and comes on once the setting is finished.
*Caution
The display automatically goes back to the Clock Display Mode when no panel operation is
performed for more than 60 seconds in the Clock Setting Mode. If this occurs, changes made will
not be reflected to the setting. If the clock setting is rewound to a time that is earlier than the time
when a heating cycle is triggered, the system will start the heating cycle.
*Note When no panel operation is performed for more than 60 seconds the display is switched to the
Display Sleep Mode and turns off. Display Sleep Mode is cancelled when Up, Down or Enter key is
pressed.
Timer setting panel
Sanden Heat Pump –– Service Technical Book
Page 38 of 48