-00
30
LOW PRESSURE INSUFFICIENT
Logical variable : DBPn
Incident codes KP02 : n1
KP07 icon :
Description
Case ¶ : No compressor on circuit n is working. The liquid valve has been open for 2 minutes, but low pressure
remains lower than safety limits.
Case · : A compressor on circuit n has been operating for more than 2 minutes. The liquid valve is open and
the expansion valve bypass valve (if applicable) has been closed for 1 minute, but low pressure is
insufficient.
Reminder: The units with an expansion valve bypass valve are those fitted with the "all seasons"
option and thermostatic expansion valves.
Case ¸ : A compressor on circuit n has been operating for over 6 minutes, all other compressors in service on
the circuit have been operating for at least 2 minutes and insufficient low pressure is detected
Action
F If circuit n is not in operation, start-up has not been authorised. If it is in operation, it stops immediately.
F The fault is displayed on the screen.
F The remote fault report is delayed for 6 minutes.
Resetting
Case ¶ & · : Three automatic fault resets are allowed daily. After this, circuit n can only be restarted
after manual resetting.
Case ¸ : Resetting is manual.
Note : "Low pressure" failure counters TOBPn are all reset to zero daily at 6 pm, on condition that the
maximum number of faults authorised has not been reached.
Trouble-shooting Solution
Insufficient circuit load.
Malfunction of the liquid solenoid valve.
Malfunction of expansion valve.
Dehydrator clogged.
Complete the load.
Check solenoid valve operation.
Check expansion valve operation.
Change dehydrator.
To Next Page
Loading...
