－36－
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Parameter setting
Normally, there is no need to change the setting of the parameters.
If necessary, follow the procedures described below.
○
Hold down the SET button for more than 3 seconds when the internal temperature is displayed.
The parameters are indicated in the following order. Press the SET button to move to the next parameter.
Display a parameter desired to be changed and set the value using the UP and DOWN buttons. Set the
parameter by pressing the SET button.
・
Differential(dF)
Initial setting
：
5
℃
Setting range: 3 – 10
℃
This indicates the temperature difference against the setting temperature at which the
compressor stops
Caution : Setting of the temperature and the cooling operation stop temperature should be made
so as to avoid repetition of compressor’s on/off operation of more than 5 times in an hour.
・
Compulsory cooling operation time(Cd) Initial setting: 30 sec
S etting range : 0 – 90 sec
This indicates the time of compulsory operation time when the UP and DOWN buttons are
pressed for 3 seconds or more at the same time.
・
High Temp. Alarm setting
Initial setting : 45
℃
Setting range: 35 – 51
℃
This indicates the temperature at which High Temp. Alarm turns on.
・
Differential for Alarm(dA)
Initial setting : 2
℃
Setting range : 1 – 20
℃
This is a differential for resetting High Temp Alarm.
AL – dA = the temperature at which the alarm is cancelled
・
Maintenance-reminder(FI) Initial setting: 0
Setting range : 0-99
This is the function to remind you maintenance works in a timely manner.
0 : This function is ineffective
1-99 : 1 means 100 hours. Notification period can be set between 100 to 9900 hours.
Time measurement in the control board is made on an hour basis.
As an example, if this is set to 99, notification is made in 9900 hours after power input.
・
Compulsory cooling operation setting at power input(CS)
Initial setting: 0
Setting : 0 or 1
This is to set the compulsory operation when power connection is made.
0 : Compulsory operation at power input is effective
1 : Compulsory operation at power input is ineffective
・
Setting for restoration method from Abnormal Heat Radiation Alarm(Pr)
Initial setting: 0
Setting : 0 or 1
Select 0 or 1 for setting manual or auto restoration from abnormal heat radiation alarm(E3).
0 : Manual restoration
1 : Automatic restoration
Refer to “5. Alarm/Safeguard (2)
in page 41 to clear the alarm.
Attention
In case Auto restoration is selected, cooling operation will restart when the overheat detector in the
refrigerant circuit is reset.
However, the contact output and the alarm code indication will not be reset.
Early maintenance is recommended. Repeated Auto restoration without solving the cause of problem
may result in trouble of the product.
・
Setting of maintenance timer(Fo)
Initial setting: 1
Setting : 0 or 1
Set the contact output behavior at the set time for notification of maintenance work.
0 : Contact output is ineffective
1 : Contact output is effective
Note: When “0” is set, no alarm output takes place at the set time although the display shows “E4”.
・
Setting assignment of alarm output terminals (AS) Initial setting: 0 Setting range : 0-3
Alarm output terminals output once an alarm is detected.
This is to assign the terminals for each alarm.
0 : Monitoring of alarm occurrence
1 : Monitoring of cooling operation and alarm occurrence
2 : Monitoring of need for power shutdown and restoration when an alarm occurs
3 : Monitoring of continued operation by the type of alarm
Note: See page 38 for the details.