Hisense AVWT-192FFFH User Manual

138
Troubleshooting
Alarm
Code
07
Decrease in Discharge Gas Superheat
● The RUN indicator (Red) is ashing
● The indoor unit number, the alarm code, the unit model code and the connected number of indoor units are displayed on
LCD. Meanwhile, the indoor unit number and the alarm code are displayed on the 7-segment of outdoor unit PCB.
★
In the case that the discharge gas superheat less than 10 deg. at the top of the compressor continues for 30 minutes,
retry operation is performed. However, when the alarm occurs twice within two hours, this alarm code is indicated.
*2): O.U. PCB Connector No. is shown below.
*1): Refer to "Characteristics of Thermistor" of "Alarm Code 23".
MV1 MVB
CN10 CN12
Is the thermistor on
top of compressor
normal? *1)
Is superheat value
under 18°F(10
o
C)?
Yes
Check the high-pressure
and compressor discharge
gas temperature and
calculate superheat value
by O.U. PCB.
Remove sudden
fluctuation of load
like short path by
discharge air from
the outdoor unit, or
the cause of frequent
thermo-ON/OFF.
Faulty Thermistor
No
No
Is the thermistor
installed correctly
on the compressor?
Yes
Install it correctly.
No
Is it at cooling or
heating mode when
the alarm occurred?
Is the connector on
I.U. PCB for
expansion valve
connected properly?
Are the refrigerant
piping and electric
wiring match?
Is refrigerant
correctly charged?
Is gas leaking?
Yes
Yes
Yes
Yes
Yes
Yes
Is superheat value
under 18°F(10
o
C)?
Cooling
Check the high-pressure
and compressor discharge
gas temperature and
calculate superheat value
by O.U. PCB.
Heating Operation
Cooling Operation
Heating
No
Plug the connectors
(*2) of O.U. PCB
properly.
No
Charge correct
refrigerant volume.
Refer to TC.
No
Check the
expansion valve.
No
No
No
Match the
refrigerant piping
and electric wiring.
Plug the
connector properly.
Repair leaks of gas.
Correctly charge
refrigerant.
No
Is the opening of the
outdoor unit heat
exchanger's expansion
valve under 8%?
Are the connectors
(*2) of O.U. PCB of
the outdoor unit heat
exchanger's electric
expansion valve
connected properly?
Yes
Yes
Model
Thermistor
Td1
(THM8)
Td2
(THM9)
Single comp.
-
Dual comp.
O.U. PCB: Outdoor Unit PCB
I.U. PCB: Indoor Unit PCB

Hisense AVWT-192FFFH Specifications

General

Brand	Hisense
Model	AVWT-192FFFH
Category	Air Conditioner
Language	English