REMKO ML 263 DC - Manual (Page 50)

Fault P1: Overvoltage/undervoltage protection AT tripped
Check whether the power supply is present and
correct. Is this normal?
NO Switch the supply and try again as soon as this
is normal again.
YES
Check all electrical connections. Are they OK?
NO
Correct the electrical connections.
YES
Check the voltage between the P and N termi-
nals of the outdoor unit. This should be approx.
320V DC. Is this voltage present?
YES
Replace the outdoor unit motherboard.
Fault P2: Excessive temperature at the compressor
Check the indoor unit and outdoor unit heat
exchangers for cleanliness. Is the air exchange
guaranteed?
NO
Clean the respective heat exchanger.
YES
Switch the unit off for 10 minutes. Check
whether the unit starts up again normally.
NO Check all electrical connections and the heat
gas probe T5.
YES
Check the fill level of the refrigerant. Is this cor-
rect?
NO Check the unit for leaks and fill with new refrig-
erant.
YES
Refrigerant cannot circulate. Possibly due to
internal contamination or kinked lines.
Fault P3: Overcurrent protection on the compressor
Check all electrical connections. Are these cor-
rectly implemented?
NO
Replace the connections.
YES
Check the compressor windings. Are they OK?
NO
Replace the compressor.
REMKO ML...DC
50