Connector Wiring Diagram
Domestic Air Conditioner
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.Service Diagnosis
1
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.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.
34
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.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.
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.3 Error Codes and Description indoor display
Code indication
fault description
Reference
Page
Indoor
displaying
panel code
indication
Outdoor
(LED1 flash
times)
Indoor and
Outdoor
E7 15
Communication fault between indoor and
outdoor units
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Summary of Contents for 1U82SA2ERA
Page 11: ... Pinping diagrams Domestic air conditioner 4ˊPinping diagrams 11 ...
Page 12: ...Operation range Domestic air conditioner 5 Operation range 12 10 0 20 16 32 10 20 15 ...
Page 54: ...Circuit diagrams 63 Domestic air conditioner ...
Page 55: ...Circuit diagrams Domestic air conditioner 12 2 Module board Circuit Diagram 64 ...
