3
ŶControl specifications
Item MDF-U53V MDF-U53VC
Temp. controller Microcomputer control system
Temperature setting range: -50°C∼-90°C
Non-volatile memory
Thermal sensor Pt.1000ȍ
Temperature display Digital display
Temperature
+5°C~+20°C for High temperature alarm (Initial; +10°C)
-5°C~-20°C for Low temperature alarm (Initial; -10°C)
ALARM lamp blinks and buzzer sounds intermittently with 15min. delay
Remote alarm contact; Normal Open, Normal Close
Allowable contact capacity; 30VDC, 2A
Door DOOR lamp is list with 2min. delay
Filter check FILTER lamp is lit and buzzer sounds intermittently
Power failure
ALARM lamp blinks, buzzer sounds intermittently and remote alarm is
output.
Remote alarm
Remote alarm terminal 3P; DC30V, 2A
NC-COM, NO-COM
Alarm
Battery check
When approx. 2.8yrs has passed with power switch is on, BATTERY lamp
is lit.
Fan motor check When approx. 5.5yrs has passed with power switch ON, BATTERY lamp
is flashed.
Freezer status monitor
・ Abnormal low voltage (When the power source voltage is 15% less
than the rated voltage)
・ Abnormal ambient temperature (When the ambient temperature is
over 35°C or lower than 0°C)
・ Overloaded run (When the running rate of compressor (L) is over
90％)
Control panel
Lamps: ALARM, BATTERY, STATUS, DOOR, FILTER
Buzzer key: BUZZER
Alarm test key: ALARM TEST
Status key: STATUS
Set key: SET
Digit shift key:
Numerical value shift key:
Key lock function
Press key for 5 seconds to display;
L0: Key lock is off L1: Key lock is on
Sensor abnormality
When any failure is occurred in sensor among temp. sensor, filter sensor,
cascade sensor and AT sensor;
zError code is displayed
zALARM lamp blinks
zRemote alarm is on
zBuzzer sounds intermittently
Compressor protection
When the cascade sensor temperature is lower than -34°C, Compressor
L is turned on.
When the cascade sensor temperature is higher than -12°C, Compressor
L is turned off.
When the overload relay and/or filter sensor is higher than +60°C,
Compressor H is turned off.
Compressor delay time
You can change the delay time both of Compressor L & H as;
2∼15min.
To Next Page
Loading...
Need help?
General
