1
4
1
Check code
[P19] / [08]
(Current code / AI-NET)
Check code name
4-way valve operation error
Cause of operation
1. 4-way valve error
2. TS1 sensor/TE1 sensor error
3. Pd sensor/Ps sensor error
4. TE sensor/TL sensor misconnection
Sub-code:
Detected outdoor unit No.
Replace sensor.
Replace sensor.
Does not discharge
refrigerant gas bypass to
suction side through
4-way valve? *1
Check 4-way valve.
If an error did not occur
in test operation,
restart the operation.
Does 4-way valve operate?
4-way valve error
Is 4-way valve coil
connector connected?
Are TS1, TE1, Pd, Ps sensor
connectors connected?
Are characteristics of resistance value
of TS1 and TE1 sensors normal?
Are output voltage characteristics
of Pd and Ps sensors normal?
Are connection and installation
of TE1 and TL sensors correct?
Reset the power supply and
start heating test operation.
Correct connector connection.
(4-way valve coil: CN317)
Correct connection
and installation.
∗
1 Check TS and TE temperature of the outdoor unit which compressors is operated.
(I/F) SW01=[1], SW02=[6], SW03=[2]
→
TS sensor temperature
SW01=[1], SW02=[7], SW03=[2]
→
TE sensor temperature
<Judgment criteria>
TE sensor: Normal if TE
≤
20˚C except summer season (Outside temp 20˚C or lower)
TS sensor: Normal if TS
≤
40˚C except summer season (Outside temp 20˚C or lower)
Correct connector connection.
TS1 sensor: CN504
TE1 sensor: CN505
Pd sensor: CN501
Ps sensor: CN500
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
FILE NO. SVM-1
40
77
