Maintenance Mode; Types Of Maintenance Mode; How To Switch To Maintenance Mode; Blockout Time Setting Mode - Sanden GAU-A45HPA Service Book

1-3 Maintenance Mode

Maintenance Mode is a function to check the heat pump status check and perform
other settings.
It should generally be assumed that a user do not operate this function.

1-3-1 Types of Maintenance Mode

There are some modes as described below exist in the Maintenance Mode.

(1) Blockout Time Setting Mode

This is a mode to set the blockout time (a setting to block HP unit operation within the setting time)
(2) Error History Display Mode
This is a mode to check the history of occurred errors.
(3) Parameter Display Mode
This is a mode to check the values measured by thermistors, etc.
(4) Drive Setting Mode
This is a mode to switch on/off the HP unit.
This mode is to disable the Heat Pump operation. Make sure to put the setting back to “"d_on”"
mode after using this mode.
(5) Compulsory Operation Mode
This is a mode to compulsorily operate the water heating cycle.
This mode is to start the Heat Pump operation immediately no matter the timer setting.
(6) Pump Remote Operation Mode
This is a mode to run the water circulation pump
This mode is used when you would like to manually remove the air inside the heat pump unit.

1-3-2 How to switch to Maintenance Mode

Press and hold down Up and Down keys together in the clock display mode to go to the
maintenance mode. After the mode is switched, press the Enter key to select a mode from
the six modes described above. To finish the maintenance mode, press and hold down
the Enter key, or leave for more than 60 seconds with no panel operation.
Display Sleep Mode
Any Key
Clock Display Mode
Press
Enter
Clock Setting Mode
Hold down “"UP”"
and “"DOWN”"
t th
No Operation
for 60sec.
Hold down
Enter
or
Press
No Operation
Enter
f
or
No Operation
f
Sanden Heat Pump –– Service Technical Book
Block out Time Setting Mode
Error History Display Mode
Parameter Display Mode
Drive Setting Mode
Compulsory Operation Mode
Pump Remote Operation Mode
Page 39 of 48
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