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Setting and Indication
Indication
(1) Individual LED
1. +5 V, +12 V (Yellow) Lights up when power is supplied to CR1-EN-PCB.
2. Alarm
3. Check
(2) 7-segment LED
When the rotary switch (SW11) is at [OPERATION] , the display indicates 1. through 4. below.
1. Normal operation
Low pressure (MPa) and high pressure (MPa) is indicated alternately in every 3 seconds.
Indicates [Lo] when the low pressure is below 0.00MPa.
Indicates [H] at the end to identify the high pressure.
Lo pres.
3 sec
2. Alarm occurred.
Low pressure (MPa) → high pressure (MPa) → Error content is displayed repeatedly.
(E.g.)
3. Method of fi xing indication of low pressure
Pressing ▼ button during normal operation fi xes the low pressure display for 10 minutes.
Pressing ▼ button again cancels the fi xed display.
However, during alarm is generated, low pressure indication cannot be fi xed.
4. The point at the lowest digit of the digital display (right bottom)
(Red)
Lights up or blinks when abnormality or alarm occurred.
For detail, refer to the "Explanation of Abnormality Alarm" in "About Alarms".
(Yellow) Lights up: "check mode" or "evacuation mode"
Blinks: Slide switch SW15 ( [CONTROL/CHECK] ) is set to [CHECK].
Hi pres.
3 sec
Lo pres.
Hi pres.
3 sec
3 sec
Blinks: Short cycle prevention function is in operation (compressor stopped).
Error
3 sec
EN - 32
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