EN - 33
EN - 32
Setting and Indication
Indication
(1) Individual LED of CRD2-EN-PCB
Name
Color
Condition when the LED lights up
Hi
Yellow
The low pressure is equal to the Control “ON value” or higher.
Lo
Yellow
The low pressure is equal to the Control “OFF value” or lower.
ALARM
Red
Lights up/blinks in the event of an anomaly or when an alarm condition is generated.
For details, refer to the “Description of Abnormality Alarm” in “About Alarms.”
CHECK
Yellow
ON: In the PCB check mode, or evacuation mode
Blink: Slide switch SW15 [CONTROL/CHECK] is set to [CHECK].
INV1
Green
Lights up during compressor operation.
INV2
Green
Not apply
DEF
Green
ON: Defrosting in operation
Blink: In the evacuation mode, Electronic expansion valve in manual control
(2) 7-segmentLED
When the rotary switch (SW11) is at [OPERATION] , the display indicates 1. through 4. below.
1. Normal operation
During normal operation, the display alternates between low pressure (MPa) →High pressure (MPa) → Unit
outlet pressure (MPa). Indicates “Lo” when low pressure is below 0.00. For identification purposes, “H” is
added to the end of high pressure, and “o” to the end of unit outlet pressure.
(E.g)
3 sec
3 sec
3 sec
Lo pres.
Hi pres.
Unit outlet pres.
2. When an alarm condition is generated.
The display alternates between low pressure (MPa) → High pressure (MPa) → Unit outlet pressure (MPa)
→Error content.
(E.g.)
3 sec
3 sec
3 sec
3 sec
Lo pres.
Hi pres.
Error
Unit outlet pres.
3. Method of fixing indication of low pressure
Pressing ▼ button during normal operation fixes the low pressure display for 10 minutes.
Pressing ▼ button again cancels the fixed display.
However, during alarm is generated, low pressure indication cannot be fixed.
4. The point at the lowest digit of the digital display (right bottom)
Blinks: Short cycle prevention function is in operation (compressor stopped).
01_OCU-CR1000VF8A.indd 32
2019/08/27 10:56:08
