Haier HSU-12H03/R(DB) [73/131] Problem symptoms and measures

Haier HSU-09H03/R(DB) [73/131] Problem symptoms and measures
7.2.Problem Symptoms and Measures
Sympt
R
m
Check Item Details of Measure
Check the power supply. Check to make sure that the rated voltage is
supplied.
None of the units
operates
Check the indoor PCB Check to make sure that the indoor PCB is broken
Operation
sometimes stops.
Check the power supply. A power failure of 2 to 10 cycles can stop air
conditioner operation.
Check for faulty operation
of the electronic expansion
valve.
Set the units to cooling operation, and compare the
temperatures of the liquid side connection pipes of
the connection section among rooms to check the
opening and closing operation of the electronic
expansion valves of the individual units.
Equipment
operates but does
not cool, or does
not heat (only for
heat pump)
Diagnosis by service port
pressure and operating
current.
Check for insufficient gas.
Large operating
noise and
vibrations
Check the installation
condition.
Check to make sure that the required spaces for
installation (specified in the Technical Guide, etc.)
are provided.
+6809,12H03/R(DB)
Demastic Air Conditioners
System Diagnosis
70

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