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3. Buzzer Auto-recovery (Ring Back function)
You can stop buzzer beeping temporary with BUZZER key pressed. Remote alarm
contact does not activate at the time.
Ring Back setting time: 1 ~ 99 minutes
* 0 minute = Buzzer does not recover if BUZZER key pressed once.
4. ON/OFF control for Compressor H
Start-up: Compressor H turns on with 2 minutes of delay after the power is supplied.
Compressor H starts with designed delay time after the power failure.
Protection: Compressor H is forcibly turned off when temperature in filter sensor is equal or
higher than +60㷄.
Recovery: Compressor H is turned on when temperature in filter sensor is equal or lower
than AT + 10㷄 and also compressor delay time is passed.
5. ON/OFF control for Compressor L
ON: When cascade temperature is equal or lower than -34㷄, Compressor L is turned on.
OFF: When cascade temperature is equal or higher than -12㷄, Compressor L is turned off.
Differential: When compressor delay timer is set at ‘0’ and controlled temperature is higher
than SV+0.5㷄, Compressor L is turned on.
When controlled temperature is SV-0.5㷄, Compressor L is turned off.
6. Monitor of freezer status
(1) Abnormal ambient temperature
When ambient temperature is equal or lower than 0㷄, or equal or higher than +35㷄,
‘Status-1’ is displayed.
(2) Voltage decline
When the voltage decreases in about 170V, ‘Status-2’ is displayed.
When the unit detects above abnormal status, the Status indication flashes on the basic
screen with massage indication.
(3) Compressor running rate
You can see compressor running rate in the indication of MENU/Svc – Status in the
screen of ‘Hardware Status’.
* Running rate of Compressor L
= {Compressor ON time / (Compressor ON time + Compressor OFF time)} x 100 (%)
7. Control of Cap. tube heater
Cap. tube heater is permitted to turn on once every 18 hours.
Cap. tube heater is forcibly turned on for 8 minutes after compressor L is turned off and
8. MENU screen
In MENU is displayed on the basic screen, MENU is automatically disappeared if there is not
any key inputs for 1 minute.
In MENU is not displayed on the basic screen, the screen is changed for renewal once every
hours.
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