DC Inverter U-match Series Floor Ceiling Type Unit
25
6.2 Working Temperature Range
Table 6.2
Test Condition
Indoor Side
Outdoor Side
DB(°C)
WB(°C)
DB(°C)
WB(°C)
Nominal Cooling
27
19
35
24
Nominal Heating
20
−
7
6
Rated Cooling
32
23
48
−
Low Temp. Cooling
21
15
-15
−
Rated Heating
27
−
24
18
Low Temp. Heating
20
−
-10
-11
Note:
① .
The design of this unit conforms to the requirements of EN14511 standard.
② .
The air volume is measured at the relevant standard external static pressure
.
③ .
Cooling (heating) capacity stated above is measured under nominal working conditions
corresponding to standard external static pressure.
The parameters are subject to change with
the improvement of products, in which case the values on nameplate shall prevail.
7. Troubleshooting and Maintenance
7.1 Troubleshooting
If your air-conditioning unit suffers from abnormal operation or failure, please first check the
following points before repair:
Table 7.1
Failure
Possible Reasons
The unit cannot be started.
① .
The power supply is not connected.
② .
Electrical leakage of air-conditioning unit causes tripping of the leakage
switch.
③ .
The operating keys are locked.
④ .
The control loop has failure.
The unit operates for a
while
and then stops.
① .
There is obstacle in front of the condenser.
② .
The control loop is abnormal.
③ .
Cooling operation is selected when the outdoor ambient temperature is
above 48°C.
Poor cooling effect.
① .
The air filter is dirty or blocked.
② .
There is heat source or too many people inside the room.
③ .
The door or window is open.
④ .
There is obstacle at the air intake or outlet.
⑤ .
The set temperature is too high.
⑥ .
There is refrigerant leakage.
⑦ .
The performance of room temperature sensor becomes worse
