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Model
CS-E7JKEW CU-E7JKE CS-E9JKEW CU-E9JKE CS-E12JKEW CU-E12JKE CS-E15JKEW CU-E15JKE CU-E15JKE-1 CS-E7JKEW-3 CU-E7JKE-3 CS-E9JKEW-3 CU-E9JKE-3 CS-E12JKEW-3 CU-E12JKE-3 CS-XE7JKEW CS-XE9JKEW CS-XE12JKEW CS-XE15JKEW
Pages
127
Size
12.25 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
File
cs-e7jkew-cu-e7jke-cs-e9jkew-cu-e9jke-cs-e12jkew-c.pdf
Date
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101
16.4.20. H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry)
Error code will not display (no TIMER LED blinking) but store in EEPROM
Malfunction Decision Conditions
Freeze prevention control takes place (when indoor pipe temperature is lower than 2
°C)
Malfunction Caused
• Clogged air filter of the indoor unit
• Dust accumulation on the indoor unit heat exchanger
• Air short circuit
• Detection error due to faulty indoor pipe temperature sensor
• Detection error due to faulty indoor unit PCB
Troubleshooting
102
16.4.21. F11 (4-way valve Abnormality)
Malfunction Decision Conditions
• When heating operation, when indoor pipe temperature is below 10
°C
• When cooling operation, when indoor pipe temperature is above 45
°C
Malfunction Caused
• Connector in poor contact
• Faulty sensor
• Faulty outdoor unit PCB
• 4-way valve defective
Troubleshooting
103
16.4.22. F17 (Indoor Standby Units Freezing Abnormality)
Malfunction Decision Conditions
• When the different between indoor intake air temperature and indoor pipe temperature is above 10
°C or indoor pipe temperature
is below -1.0
°C
Remark:
When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor unit and H39 to
other indoor unit(s).
Malfunction Caused
• Wrong wiring connection
• Faulty sensor
• Faulty expansion valve
Troubleshooting
104
16.4.23. F90 (Power Factor Correction Protection)
Malfunction Decision Conditions
During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit
main PCB senses abnormal high DC voltage level.
Malfunction Caused
• DC voltage peak due to power supply surge.
• DC voltage peak due to compressor windings not uniform.
• Faulty outdoor PCB.
Troubleshooting
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