Service Diagnosis; Caution For Diagnosis; Codes And Description; Problem Symptoms And Measures - Haier HSU18XH7-G - Ductless Split Indoor Wall Mount Unit Heat Pump Service Manual

7.Codes and Description

7.1.Problem Symptoms and Measures

Symptom
None of the units
operates
Equipment
operates but does
not cool, or does
not heat (only for
heat pump)
Large operating
noise and
vibrations
HSU-18 24HEK13/R2
Check Item
Check the power supply.
Check the indoor PCB
Diagnosis by service
port pressure and
operating current.
Check the installation
condition.
31
Details of Measure
Check to make sure that the rated voltage is
supplied.
Check to make sure that the indoor PCB is broken
Check for insufficient gas.
Check to make sure that the required spaces for
installation (specified in the Technical Guide, etc.) are
provided.
Functions and control
Domestic air conditioner