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When there is no failure, if the starting condition can not be met, digital tube on master unit will display stand-by
code:
555.0 Standby state of capacity overmatch When capacity is over 135% or lower than 50%, the system is standby.
555.1 Standby state of 26 degree heating mode
When it is in heating mode with ambient temperature over 26 degree, the system is
standby.
555.2
Standby state of super low pressure (lack of
refrigerant)
When the unit starts in cooling with Ps<0.23MPa or heating with Ps<0.12MPa, the
system is standby.
555.3 54 Degree cooling standby
High ambient models ,the unit can't open if ambient temp. above 54 degree ,7-
segment board display :"555.3"
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