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9

Table 7-2

Symptoms

Causes

Solution

The fan speed can 

not be changed.

•  Check whether the MODE indicated 

on the display is "AUTO"

When the automatic mode is 

selected, the air conditioner will 

automatically change the fan speed.

•  Check whether the MODE 

indicated on the display is "DRY"

When dry operation is selected, the air 

conditioner automatically change the fan 

speed. The fan speed can be selected 

during "COOL" , "FAN ONLY", and "HEAT"

The remote controller signal 

is not transmitted even when 

the ON/OFF button is pushed.

•  Check whether the batteries in the 

remote controller are exhausted.

The power supply is off.

The TEMP. indicator 

does not come on.

•  Check whether the MODE indicated 

on the display is FAN ONLY

The temperature cannot be 

set during FAN mode.

The indication on the display 

disappears after a lapse of time.

•  Check whether the timer operation 

has come to an end when the TIMER 

OFF is indicated on the display.

The air conditioner operation 

will stop up to the set time

The TIMER ON indicator goes 

off after a lapse of certain time.

•  Check whether the timer operation 

is started when the TIMER ON 

is indicated on the display.

Up to the set time, the air conditioner 

will automatically start and the 

appropriate indicator will go off.

No receiving tone sounds from 

the indoor unit even when the 

ON/OFF button is pressed.

•  Check whether the signal transmitter 

of the remote controller is properly 

directed to the infrared signal 

receiver of the indoor unit when 

the ON/OFF button is pressed.

Directly transmit the signal transmitter 

of the remote controller to the

infrared signal receiver of the

indoor unit, and then repeatly push 

the ON/OFF button twice.

7.2 Troubles and causes of remote controller

Before asking for serving or repairing, check the following points.
(see in Table 7-2)

16127000A15627 V.A

Summary of Contents for MDV-V100W/DN1

Page 1: ...g our air conditioner Before using your air conditioner please read this manual carefully and keep it for future reference Mini VRF C Series Owner s Manual MDV V80W DN1 C MDV V100W DN1 C MDV V120W DN1 C MDV V140W DN1 C MDV V160W DN1 C ...

Page 2: ...gerant pipe connector NOTE All the pictures in this manual are for explanation purpose only They may be slightly different from the air conditioner you purchased depend on model The actual shape shall prevail 16kW complying with IEC 61000 3 12 Fig 1 ...

Page 3: ...s the button of the remote controller with a hard pointed object The remote controller may be damaged Never replace a fuse with that of wrong rated current or other wires when a fuse blows out Use of wire or copper wire may cause the unit to break down or cause a fire It is not good for your health to expose your body to the air flow for a long time Do not insert fingers rods or other objects into...

Page 4: ... effectiveness of machine and then try to open the indoor units at different time The outdoor unit window shades should be periodic cleaning in case of being jammed This window shapes is heat dissipation outlet of components if being jammed will cause the components shorten their service life spans because of overheated for a long time The temperature of refrigerant circuit will be high please kee...

Page 5: ...outlet position and set the fan speed to High 4 OPERATION AND PERFORMANCE 4 1 Protection Equipment This Protection Equipment will enable the Air Conditioner to stop when the Air Conditioner is to be directed running compulsively When the Protection Equipment is activated the Operation Indicator still lights while the Air Conditioner is not running But the Check Indicatior Lights The protection equ...

Page 6: ... board stop abnormally Recoverable EE 2 Communication error between indoor and outdoor unit Recoverable E2 3 Outdoor heat exchanger temperature sensor T3 error or outdoor ambient temperature sensor T4 error Recoverable E4 4 Input voltage protection Recoverable E5 5 DC fan protection Recoverable E6 6 Discharge pipe temperature sensor error Recoverable E7 7 EEPROM mismatch Unrecoverable E9 8 Compres...

Page 7: ...h reserved Recoverable HF 15 L L0 L1 fault occurs three times in one hour Unrecoverable H4 16 The fault is increased or reduced on the IDU Recoverable H7 17 IPM protection Recoverable L0 18 DC bus low voltage protection Recoverable L1 19 DC bus high voltage protection Recoverable L2 20 MCE error Recoverable L4 21 Zero speed protection Recoverable L5 22 Compressor phase sequence error Recoverable L...

Page 8: ...speed protection Recoverable L5 20 Compressor phase sequence error Recoverable L7 21 Protection for compressor speed change 15Hz Recoverable L8 22 Protection for the difference between the set speed and the running speed of the compressor 15Hz Recoverable L9 23 Radiator surface temperature protection Recoverable PL 24 System high pressure protection Recoverable P1 25 System low pressure protection...

Page 9: ...shah sound is heard when the system is in cooling operation or at a stop When the drain pump optional accessories is in operation this noise is heard A pishi pishi squeaking sound is heard when the system stops after heating operation Expansion and contraction of plastic parts caused by temperature change make this noise Symptom 4 2 Indoor unit outdoor unit A continuous low hissing sound is heard ...

Page 10: ...arge refrigerant Vacuum and recharge refrigerant Maintenance or change compressor Install manostat Find reasons and solution Low cooling effect Outdoor unit and indoor unit heat exchanger is dirty The air filter is dirty Inlet outlet of indoor outdoor units is blocked Doors and windows are open Sunlight directly shine Too much heat resource Outdoor temp is too high Leakage of refrigerant or lack o...

Page 11: ...apse of time Check whether the timer operation has come to an end when the TIMER OFF is indicated on the display The air conditioner operation will stop up to the set time The TIMER ON indicator goes off after a lapse of certain time Check whether the timer operation is started when the TIMER ON is indicated on the display Up to the set time the air conditioner will automatically start and the app...

Page 12: ......

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