Turbo Air TAS-18EHN Service Manual page 53

9.2.7 High temperature protection of compressor top diagnosis and solution (P2)
Check if the air flow system
of indoor and outdoor units
are obstructed?
No
Turn off the power supply and turn
it on 10 minutes later.
Yes
Check if the unit can
start normally.
Yes
Check if the refrigerant
charge volume is normal?
Yes
Refrigerant system is blocked, such
as capillary or welded point of pipes.
9.2.8 Refrigerant Leakage Detection diagnosis and solution(EC)
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Is there cool air blowing
out from indoor air outlet?
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)
Clear the blocking.
Clear up the air inlet and outlet or the heat
Yes
exchanger of indoor and outdoor units.
Check if all the connection, especially
No the connection of OLP (Over Load
Measure the resistance
between the two ports of
the OLP. Is it zero?
No
Recharge the correct
refrigerant volume.
Yes
No
No
Yes
Protector) sensor is good.
Yes
Yes
Check if T2 sensor is well
fixed. Correct the installation
Yes
or replace T2 sensor. Does
the problem remain again?
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
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No Correct the connection.
No Replace the OLP.
Replace the outdoor control PCB.
Yes