Check code
1501
Blocked valve in cooling mode
Abnormal points and detection methods Causes and check points
Abnormal if stop valve is blocked during cooling operation.
Abnormal when both of the follwing temperature condition is satisfi ed for
20 minutes or more during coling condition.
1. TH22j − TH21j
]
−2 °C [28.4 °F]
2. TH23j − TH21j
]
−2 °C[28.4 °F]
Note:
For indoor unit, the abnormality is detected if an operating unit satisfi es the
condition.
Outdoor liquid/gas valve is blocked.
Mulfunction of outdoor LEV (LEV1)(blockage)
TH21: Indoor intake temperature thermistor
TH22: Indoor liquid pipe tmperature thermistor
TH23: Indoor gas pipe tmperature thermistor
LEV: Linear expansion valve
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
v
Is the
outdoor liquid/gas valve
fully
open?
Open the
outdoor liquid/gas valve fully
.
No
Yes
Disconnect the outdoor LEV wiring to
check the resistance.
No
Yes
Replace the outdoor LEV.
Replace the outdoor controller board.
Is there a resistance detected?
47
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