Tosot TW09HXP2A1A - 9.2 Troubleshooting Procedures

56
Installation and Maintenance
Service Manual
No. Malfunction Name
Display Method of
Indoor Unit
A/C status Possible Causes
Dual-8 Code
Display
47
Malfunction of detecting
plate(WIFI )
JF
Loads operate normally, while the unit can’t be
normally controlled by APP.
1. Main board of indoor unit is damaged;
2. Detection board is damaged;
3. The connection between indoor unit and
detection board is not good;
48
Refrigerant recovery
mode
Fo
Refrigerant recovery. The Serviceman operates
it for maintenance.
49
Undened outdoor unit
error
oE
Cool: compressor and outdoor fan stops
operation, while indoor fan operates; Heat:
compressor, outdoor fan and indoor fan stop
operation.
1. Outdoor ambient temperature exceeds the
operation range of unit (eg: less than-20
o
C or
more than 60
o
C for cooling; more than 30
o
C for
heating);
2. Failure startup of compressor?
3. Are wires of compressor not connected
tightly?
4. Is compressor damaged?
5. Is main board damaged?
9. Maintenance