14
KEY LOCK FUNCTION
This unit is provided with the key lock function. When the key lock is ON, change of the setting through
the key pad is not available. The key lock is set in OFF at the factory.
Display Mode
Function
L o 0
Key lock is OFF
Enable to change of temperature setting
L o 1
Key lock is ON
Disable to change of temperature setting
Table 2 Procedure for key lock setting (change from key lock OFF to key lock ON)
Description of operation
Key operated
Indication after operation
1
----
The current chamber temperature is
displayed.
2 Press digit shift key for 5 seconds.
The first digit is displayed.
3
Press numerical value shift key and
scroll the figure to 1.
When pressed, the figure of settable
digit changes.
4 Press set key.
SET
The key lock is set to ON.
The current chamber temperature is
displayed.
The setting mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing the set key (SET) is not memorized.
The key lock only works with the chamber temperature setting and the defrost key (DEF).
A key lock function becomes on when it is changed to Lo1 with a process 3.
REMOTE ALARM TERMINAL
WARNING
Always disconnect the power supply cord before connecting an alarm device to the remote alarm
terminal.
The terminal of the remote alarm is installed at the lower left side of the unit. The alarm is outputted
from this terminal. Contact capacity is DC 30 V, 2 A.
between COM. and N.O.
between COM. and N.C.
At
normal
Open
Close
At
abnormal
Close
Open
Note:
The alarm status of remote alarm terminal and audible alarm are cancelled by pressing the buzzer stop
key (BUZZER) since the remote alarm is operated in conjunction with buzzer (except for power failure
alarm status). The visual alarm will remain active until the alarm condition is rectified.
