Daikin 10 - Page 109

106
7
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
Control panel display
U0
Shortage of Refrigerant
Check for clogs, moisture
choke, and others in the
refrigerant piping system.
Replace the intended
thermistor (Th-7 or Th-8).
(See page
130–131/146–147)
Adjust the refrigerant
amount properly, and find
the cause of refrigerant
leakage (e.g. broken
piping), and correct it.
NO
NO
Is the refrigerant
amount normal?
Is the resistance
normal?
YES
YES
Remove the condenser thermistor (Th-7) and EE
valve outlet thermistor (Th-8) from the control
board, and measure the resistance with a tester.
"Check 1" (See page 116)
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
Detect the condenser
temperature (Th-7) and the
EE valve outlet temperature
(Th-8) and make judgment of
refrigerant quantity.
3
Malfunction Decision Conditions
Class Conditions
10
When ① and ②
continue for a period of
180 seconds.
① Command capacity
≧95%
② Condenser
temperature －
EE valve outlet
temperature ≦5℃
4
Supposed Causes
1Shortage of refrigerant
1Clogged refrigerant piping
1Moisture choke
1Broken piping
1Faulty condenser thermistor
(Th-7)
1Faulty EE valve outlet
thermistor (Th-8)
00_PB00540A_M10.indb 106 2023/08/09 12:59:07