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5-4. Details of Alarm Messages
SPW-C256/366VH
Alarm Details
(1-1) [Alarm "P29"]
Start of defect diagnosis
Is the power voltage correct?
compressor wiring
connector and U/V/W connections
on the compressor
detected values of CT
current (current values) during
compressor operation
(No problem
with the CT
5
detected value)
Are the resistance
values permissible at all
areas in HIC mounted on
outdoor unit control
(No problem with
the resistance value)
Is the insulation on the
compression OK?
(No problem with
the insulation)
Replace the outdoor unit control PCB.
Start-up failure of the compressor (will not start up)
Related parts
• Outdoor unit control PCB
No
Improve the power voltage line.
Check the following:
Check to ascertain that the power voltage is within the permissible range of 198 to 264V
Yes
for indoor and outdoor units regardless of whether the compressor is operating or not.
* Pay special attention to whether the voltage drops after compressor operations while
Are the
measuring.
No
Repair the wiring connectors.
Compressor's wiring connector
terminal
3P : white
OK?
Yes
Is the
No (The CT detected value is abnormal.)
Replace the outdoor unit control PCB.
When the CT detected value is abnormal, the alarm occurs and the compressor stops
normal?
after 1-minute operation.
Verify the CT current values by performing the following steps.
Yes
Confi rm that the difference between CT current detected values (*) and the current value
(measured by clamp meter) of power source wiring (between outdoor unit
power terminal and control PCB; red, white, blue) is within aproximately 1A.
* Verifi cation method of CT current detect
1. With the outdoor unit maintenance remote controller
2. With the indoor unit remote controller
No (Abnormal resistance value)
Replace the outdoor unit control PCB.
• Verifi cation method
PCB?
Yes
No (Defective insulation)
Replace the compressor.
• Potential cause:
• Verifi cation Method
Yes
(Model 256 : CR-C256VH)
(Model 366 : CR-C366VH)
Check with the code "14" with the temperature sensor display function.
Check with the sensor address "14" of the temperature sensor display function.
Measure the resistance at all areas on the HIC control mounted on the outdoor unit
control PCB.
Refer to the page 5 - 12.
Replace the outdoor unit control PCB if the readings are below permissible values.
Insulation failure caused by the compressor lock.
Remove the wires from the connectors on the top of the compressor. Measure
the insulation resistance of the U, V and W phases and confi rm that they are 1MΩ or
more.
5-8
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