'操作说明 Hotflow THREE_26_zh.pdf - 第517页

14. DIAGNOSIS OF UNPLANNED SWITCH OFFS ENGLISH Translation of the original 60 451820.66.03_EN 2020-05-05 14.1 Diagnosis of control and operating unit ST 501 E1 to E4 light up - When the cooling unit is ready for operatio…

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Translation of the original ENGLISH 14. DIAGNOSIS OF UNPLANNED SWITCH OFFS
451820.66.03_EN
2020-05-05
59
14. DIAGNOSIS OF UNPLANNED SWITCH OFFS
Follow the safety notes in chapter 1!
The diagnosis is based on the wiring diagram, flow chart and messages displayed on the control
and operating unit.
Regulation is based on the main setpoint value.
Displays in the control and operating unit
See chapter 11. Operation
Frequent, repeated resetting or restarting, particularly in the case of high- and low-pressure
cut-offs, can result in damage to the cooling unit that is not covered under warranty!
14. DIAGNOSIS OF UNPLANNED SWITCH OFFS ENGLISH Translation of the original
60
451820.66.03_EN
2020-05-05
14.1 Diagnosis of control and operating unit ST 501
E1 to E4 light up
- When the cooling unit is ready for operation.
UP or DOWN arrow lights up
- In the case of differential regulation, setpoint value limits are configured for switching to fixed-
setpoint regulation.
- If the values exceed or fall short of the set limit values, the relevant LED display lights up.
Display in the case of a diagnosis:
F1 – F8 flashes alternately with the actual value display.
(See following pages for overview of diagnostic messages on the control and operating unit ST 501)
1
2
3
SET
E1
E2 E3
E4
F1
F2
°C
Translation of the original ENGLISH 14. DIAGNOSIS OF UNPLANNED SWITCH OFFS
451820.66.03_EN
2020-05-05
61