Malfunction Display: High Pressure Protection - Gree SUPER+ MULTI ULTRA Series Service Manual

Super Free Match
Service Manual

3.2 Malfunction display: High Pressure Protection

High pressure protection
Check the pressure
with a manometer: is it
really high?
Yes
Check work
mode of indoor unit:
is it properly set?
Yes
Check the stop
valves: are they open?
Yes
Check the
flow of the air inlet/ outlet: is
it not blocked?
Yes
Check the
panel of outdoor unit: is it
firmly closed?
Yes
Check the fans
of indoor unit and outdoor
unit: is it run?
Yes
Check the
swing louver of indoor unit:
is it completely open?
Yes
Check the
indoor/outdoor filter and heat
exchange fin: is there filth
blockage?
No
Refrigerant pipe is blocked
MAINTENANCE 124
Check the
No
pressure switch :is it
normal?
No
Refer to Instruction Manual
of indoor unit
No
Completely open the valve
No
Remove the barrier
No
Close the panel
No
Measure the fan motor and
signal input
No
Measure swing motor and
signal input
Yes
Refer to Care and Maintenance
Mainly check the inlet and outlet of main pipe connecting with each
indoor unit and capillary of indoor and outdoor units. Replace the
parts like filter, capillary and so on.
Check the
Yes
high pressure sensor: is
it normal?
No
Replace the pressure
switch
No
Replace the outdoor
unit mainboard
Yes
Replace the high
pressure sensor