60
DC Inverter Multi VRF System II
Service Manual
(2) High pressure protection
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Check whether the panel of
outdoor unit is covered and
sealed well
Check whether the air can blow
smoothly at the heat exchanger
of indoor unit and outdoor unit
Check whether the indoor fan
and outdoor fan can operate
Cover the panel of
outdoor unit well
Eliminate obstacles and
sundries
Measure the
circumstances of fan
motor and signal input
Check whether the indoor
swing blade is open completely
Measure the
circumstances of swing
motor and signal input
Check whether the electronic
expansion valve for indoor
unit and outdoor unit can
operate normally
Engage valve and coil
Blockage for system
pipeline
Mainly check the air inlet and air outlet connecting indoor
unit and main pipe, and the expansion valve for indoor unit
and outdoor unit. Replace electronic expansion valve , dry
strainer, ect.
yes
�
yes
yes
yes
yes
yes
yes
no
no
no
no
no
no
no
no
no
Check whether the refrigerant-
charging volume is superfluous
Charge refrigerant according to the volume on
nameplate;
yes
no