Kaisai ICE Series, Service Manual

Page: 146 / 168

 Troubleshooting 
TS12-S: Inverter compressor drive error diagnosis and solution
Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication
signal detection, voltage detection, compressor rotation speed signal detection and so on.
Recommended parts to prepare:
• Connection wires
• IPM module board
• Outdoor fan assembly
• Compressor
• Outdoor PCB
Troubleshooting and repair:
Check the wiring between
PCB and compressor.
Check the wiring between
PCB and compressor.
Does an error exist?
Does an error exist?
Ensure proper connections or
replace the wires and connectors.
Ensure proper connections or
replace the wires and connectors.
YES
NO
Are the IPM terminal
resistance uniform?
Are the IPM terminal
resistance uniform?
Replace the IPM board or
replace the outdoor PCB.
Replace the IPM board or
replace the outdoor PCB.
NO
Check the outdoor fan and the
outdoor unit ventilation.
Check the outdoor fan and the
outdoor unit ventilation.
YES
Is it in working order?
Is it in working order?
Please refer to the solution of the
“
fan
speed is operating outside of the normal
range
”
malfunction.
Please refer to the solution of the
“
fan
speed is operating outside of the normal
range
”
malfunction.
NO
Check the compressor
resistance values.
Check the compressor
resistance values.
YES
Are they uniform?
Are they uniform?
Replace the compressor.
Replace the compressor.
Replace the outdoor PCB.
Replace the outdoor PCB.
YES
NO
Check if the IPM
installed correctly.
Check if the IPM
installed correctly.
YES
NO
Correct the installation, tighten the
screws and apply silicon grease
Correct the installation, tighten the
screws and apply silicon grease
IPM continuity check
IPM continuity check
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.