REMKO RXT xxx DC - Manual (Page 41)

7. Fault code P2: low pressure fault
Is the connecting cable
from the lower pressure
switch to the main
board OK? Correct
connection
No
Yes
Low pressure switch
may be defective
Bypass the low pressure
switch on the circuit
board. Does the unit
work now?
Replace the high
pressure switch
Yes
Switch off unit
No
Yes
Is the outdoor
temperature too low? Check refrigerant
pipes
The refrigerant pipes
may be leaking
No
Check the refrigerant
pipes with leak
detection spray or an
electronic leak detector
Yes
Check the refrigerant
pressure with a
manometer. Is the
refrigerant pressure less
than 1.4 bar?
Refrigerant pipe may
be blocked
No
Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill
No
Replace outdoor com-
ponent main board
41