Mitsubishi Electronics QJ7MES96 Thermostat User Manual


 
4
SETTINGS AND PROCEDURE TO OPERATION
4.8 Battery
4.8.3 Battery replacement
4
- 21
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
SETTINGS AND
PROCEDURE TO
OPERATION
5
INSTALLATION AND
UNINSTALLATION
6
FUNCTIONS
7
MES INTERFACE
FUNCTION
CONFIGURATION TOOL
8
DB CONNECTION
SERVICE AND
SETTING TOOL
4.8.3 Battery replacement
This section explains how to replace the MES interface module battery.
The battery of the MES interface module is used for file protection.
If the voltage of the MES interface module battery has dropped, the battery must be
replaced.
(1) Checking the MES interface module for a battery voltage drop
1 Check for a battery voltage drop in the Battery status area (Buffer memory
address: 7).
2 The following results from battery errors.
"1 (ON)" is written to the Battery status area (Buffer memory address: 7).
The ERR. LED is turned ON, and ERR. LED status (X10) and Other error
(X1C) are turned ON.
The file contents will not be erased immediately after the battery error
occurrence, but may be erased if the battery error is not recognized.
3 Finish the battery replacement in the total power failure compensation time since
the Battery status area is turned ON is within the specified time.
Figure 4.19 Checking for a battery voltage drop
Y100 is turned ON
at battery error.