Connector Wiring Diagram
Domestic Air Conditioner
1 .Service Diagnosis
1 .1.1 Caution for Diagnosis
The operation lamp flashes when any of the following errors is detected.
1.When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions,
disabling equipment operation.
2.When a signal transmission error occurs between the indoor and outdoor units.In either case, conduct the
diagnostic procedure described in the following pages.
31
1 .1.2 Problem Symptoms and Measures
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None of the units
operates
Check the power supply.
Check to make sure that the rated voltage is supplied.
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.
Equipment
operates but
does not cool, or
does not heat
(only for heat
pump)
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.
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.
10.2 Parameter of primary electronic appliance
N O
N am e
Param eter
Picture
1
Rated voltage:12V
ELECTRIC
EXPANSION
VALVE
Valve orifice : Φ1.8mm
Coil resistance 46±3.7
Summary of Contents for 1U71SABFRA
Page 11: ...Pinping diagrams Domestic air conditioner 4 Pinping diagrams Filter Filter ...
Page 12: ...Operation range Domestic air conditioner 5 Operation range 10 0 20 16 32 10 20 15 10 ...
Page 43: ...Seivice diagnosis Domestic air conditioner 41 ...
Page 44: ...Seivice diagnosis Domestic air conditioner 42 ...
Page 45: ...Seivice diagnosis Domestic air conditioner 43 ...
Page 56: ...Circuit diagrams Domestic air conditioner 54 ...
