Sharp AY-X36RU Service Manual page 27

High-pressure Protection
14.
High-pressure protection
measure if the pressure is
Check if the operation mode of
indoor unit is set properly?
Check if the gas valve and
liquid valve are fully open ?
Check if the front panel of
outdoor unit is covered tightly?
Check if the air inlet and outlet of
outdoor fans operate normally?
Check if the indoor swing
Check if the capacity output of
outdoor unit is equal to the
capacity demand of indoor units ?
Check if the indoor / outdoor
filters or radiating fins are dirty or
Use pressure gauge to
no
really high?
yes
no
yes
no
yes
no
yes
no
the indoor and outdoor
exchanger is smooth ?
yes
no
Check if the indoor and
yes
no
louver is fully open ?
yes
no
yes
no
blocked ?
no
Clean the fins
yes
Measure if the pressure switch
is normal
no
Set the correct operation
mode
Fully open the valve
Cover up the front panel
properly
Remove the obstructions
Measure the fan motor and
signal input
Measure the swing motor and
signal input
Refer to the dial -up of indoor
and outdoor unit
The system pipe is blocked
27
Replace the mainboard of
outdoor unit
Replace the pressure switch
Replace the blocked parts or
pipe
AY-X36RU
AE-X36RU