Super Free Match
Service Manual
MAINTENANCE
136
Low pressure protection
Check the
pressure with a manometer:
is it really low?
Check work
mode of indoor unit:
is it properly set?
Check stop
valves: are they completely
open?
Check the
panel of outdoor unit: is it
firmly closed?
Check the
flow of the air inlet/outlet: is
it not blocked?
Check the
fans of indoor unit and outdoor
unit: is it run?
Check the
swing louver of indoor unit:
is it completely open?
Check the
indoor/outdoor filter and heat
exchange fin: is there filth
blockage?
Refrigerant pipe is blocked
Refer to Care and Maintenance
Measure swing motor and signal input
Measure the fan motor and signal input
Remove the barrier
Close the panel
Completely open the valve
Refer to Instruction Manual of indoor unit
Yes
No
Check
refrigerant in the system: is it
sufficient?
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
Charge refrigerant according to the amount specified in the
nameplate and calculated additional amount
Replace the outdoor unit mainboard
Check the
low pressure sensor: is
it normal?
Replace the low pressure sensor
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
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