Table of Contents
6.7 Troubleshooting Outdoor Error
CH 38 (Refrigerant leakage error)
Flow of trouble diagnosis
Items for
checking
Is the product
installation status OK?
Is each temperature
sensor normal?
Is EEV assembly
status OK?
Isn't refrigerant
insufficient?
! Caution : Before checking PCB or various outdoor unit electricity flowing parts, start the checking 3 minutes after
power cut off. If it is measured in power supply stand by state, check the tester's measurement mode and
be careful of the short circuit with parts other than the measurement part.
Sub-items for
• Check pipe bending or problem
• Check service valve locking
• Action: Remove cause of the problem
• Sensors to check: indoor temperature,
outdoor temperature, indoor pipe OUT
temperature, outdoor heat exchanger
middle temperature
• Check sensor assembly status
• Check if sensor is damaged: measure
resistance (Refer to each sensor
verification method)
• Action: Replace the sensor
• Check PCB CN - EEV1 assembly status
• Check EEV (Electronic Expansion Valve)
assembly status
• Action: Assemble / replace EEV
• Check if refrigerant is leaked
• If refrigerant is insufficient, refill refrigerant
• Action: Take action in the leakage part and refill refrigerant
- 145 -
checking
• This error occurs only in some models.
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5. Trouble Shooting
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