CIAT Magister 2 Series, Установка, Эксплуатация, Пусконаладка, Обслуживание

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Saved in fault memory:
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Resetting:
- If the number of faults in 24 hours
≤ 3 → the fault is automatically acknowledged if BP > P55 + 2b.
- If the number of faults in 24 hours > 3
→ the fault is acknowledged if BP > P55 + 2b and
Reset is pressed on the console.
If a fault occurs on the sensor on the open circuit, the fault is preceded in the fault memory by an LP fault.
Special case for reversible machines and water chilling: the fault threshold switches to P55+1 b and normal operation is restored if BP >
P55 + 3 b.
Special case for reversible machines and water heating:
Defrosting is forced on when the LP is < P55 for 1 minute.
If defrosting is forced on 3 times in 1 hour, the circuit with a LP fault is turned off the fourth time the LP drops below P55.
15.6 Management of superheat faults
The superheat temperature on the suction end of each circuit can be monitored by comparing the LP saturation temperature to the suction
temperature.
This protection is enabled by setting P43 to
„Yes‟ (No by default). It protects the compressor(s) from excessively low or high superheat values.
If superheat protection = Yes
→ This function is turned on when at least the first control stage (per circuit) is on and 5 minutes after the first
stage is turned on.
Minimum superheat fault:
- If the superheat value (P307 or P337) drops below the minimum superheat limit value (P44) for 1 minute, the circuit is shut off and the
minimum superheat error message is displayed.
- The unit automatically restarts after 5 minutes (5 seconds in test mode).
- This function remains on in test mode.
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Display:
If there are more than 3 cuts in 1 hour
The unit is turned off by the superheat protection. The
Reset button must be pressed in order to restart the circuit.
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Display:
Maximum superheat fault:
- If the superheat value (P307 or P337) rises above the maximum superheat limit value (P45) for 1 minute and the evaporating temperature <
15°C, the circuit is shut off and the maximum superheat error message is displayed.
- This function is turned off during defrosting.
- The unit automatically restarts after 5 minutes (5 seconds in test mode).
- This function remains on in test mode.
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Display:
If there are more than 3 cuts in 1 hour, the unit is turned off by the maximum superheat protection and the Reset button must be pressed in
order to restart the circuit.
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Display:
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If a permanent fault occurs:
- Fault stored in memory in case of a mains power failure
- Fault saved in fault memory - Relay in On position
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If a temporary fault occurs:
- Fault not stored in memory if a mains power failure occurs
- Fault saved in fault memory
- The minimum or maximum superheat fault relay on the relay board is in the Off position
During test mode, the time delays are counted down in seconds,
not minutes.
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Messages in the fault memory:
x . C I R C U I T x L P
M I N S U P E R H E A T F A U L T C X
X C U T ( S ) I N 1 H
C I R C U I T X O F F
M I N . S U P E R H E A T F A U L T
M A X S U P E R H E A T F A U L T C X
X C U T ( S ) I N 1 H
C I R C U I T X O F F
M A X . S U P E R H E A T F A U L T
C X M I N . O V E R H E A T
C X M A X . O V E R H E A T