6-2
Symptom
Checkpoint
Remedy
Cause
F. Evaporator
fan and
condenser
fan run, but
compressor
does not run
(throbs)
・
Faulty power supply of
compressor system
・
Burnt-out of compressor
motor (disconnection)
・
Faulty connection of
terminal board of
compressor
(disconnection, entering
of water)
Disconnection of
magnetic contactor
coil
Faulty controller (Ry)
Faulty RPP
(reverse phase
protector)
Is the magnetic
contactor for compressor
turned ON?
Is the voltage between
the wiring 134
and 155 24V AC?
Check for disconnection of
compressor motor coil
Check the terminals
Check the voltage
Faulty coil of magnetic
contactor for compressor
Faulty RPP
operation
NO
(Reverse phase)
Check the controller
and compressor
Replace RPP
Is the voltage between
the wiring 133 and 134 (1-2 of CN19)
24V AC?
※
1
Faulty controller Ry
NO
YES
(Normal phase)
Normal phase?
YES
YES
NO
NO
YES
※
Refer to Schematic wiring diagram
RPP
155
1
2
C C
※
1. Connector type terminal board
CN19 (10pin)
Stopped if the main
power supply
voltage drops and
compressor stops
with E103 or E105
error.
All the three phases should be AC 300 V or higher
Ⅰ
Unit does not operate
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