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3

Displayed contents

Current frequency

Operating mode

Operating fan speed and leave

Total IDU capacity 

requirement

Capacity requirement for 

the modified ODU

T3 tube temperature

T4 ambient temperature

T5 discharge temperature

TF module temperature

TL refrigerant cooling tube 

temperature

Display "--"

Last error or protection code

Program version NO.

Priority mode

ODU address in the centralized

control system

Model

Number of running IDUs

Total number of IDUs

T2/T2B average temperature

DC bus voltage check

Actual voltage value

Inventer compressor current

Actual current value

EXV position

NOTE

 

12 hours preheating is imperative after turn on the power 

switch. Please do not shut down the power when the unit is 

supposed to stop running in 24h or shorter time. (This is to 

warm the crankcase heat box to avoid compulsive start of 

condenser.)

 

Pay attention not to block the air inlet and outlet. Blocks may 

decrease the efficiency of the unit or startup the protector, 

which will stop running.

 

Operate the switches and push buttons with an insulated stick 

(such as a closed ball-point pen) to avoid touching of live 

parts.

3.  OPERATION RANGE

Use the system in the following temperature for safe and effective 

operation. The Max operation temperature for the air conditioner. 

(Cooling/Heating)

Table 3-1

Model

8/10/12kW

14/16kW

Cooling

Room temperature

17°C to 32°C  17°C to 32°C 

Outdoor temperature -5°C to 55°C  -5°C to 55°C 

Heating

Room temperature

0°C to 30°C  0°C to 30°C 

Outdoor temperature -15°C to 27°C  -15°C to 27°C 

Dehumidification

Room temperature

12°C to 32°C  12°C to 32°C 

Outdoor temperature -5°C to 55°C  -5°C to 55°C 

NOTE

1.  If the above operating conditions cannot be met, the safety 

protection function may be triggered and the air conditioner 

may malfunction.

2.  When the unit operates in "cooling" mode in a relatively 

humid environment (relative humidity higher than 80%), 

condensation may occur on the surface of the IDU and water 

may drip. In this case, turn the air guide to the maximum air 

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 equipment may be activated in following conditions:

■ Cooling Operation

 

The air inlet or air outlet of outdoor unit is blocked.

 

Strong wind is Continuously blowing to the air outlet of the 

outdoor unit.

■ Heating Operation

 

Too much dust and rubbish adhere to the dust filter in the 

indoor unit

 

The air outlet of indoor unit is choked

NOTE

When the protection equipment starts, please shut down the 
manual power switch, and restart operation after problem is 
solved.

4.2 About power cut

 

● If power is cut during operation, stop all the operation immediately.

 

● Power comes again. The lamp on the display panel of indoor unit 

flashes. And then unit will auto-restart.

 

● Mishandling in operation: 

If mishandling happens because of lighting or mobile wireless, 

please shut off the manual power switch, and turn on again, then 

push the ON/OFF button.

4.3 Heating capacity

 

● The heating operation is a heat-pump process that heat will 

be absorbed from outdoor air and released in doors. Once the 

outdoor temperature is decreased, heating capacity decreased 

corredpindingly.

 

● Other heating equipment is suggested to be used together when 

outdoor temperature is too low.

 

● In some extreme cold upland that buy another inddoor unit 

equipped electrical heater will obtain better performance. (Refer to 

indoor unit owner’s manual for details)

NOTE

1. The motor in Indoor Unit will continue running for 20~30 seconds 

for to remove residual heat when the Indoor Unit recoeiving OFF 

command during heating operation.

2. If the air conditioner malfunction occurs because of disturb, 

pleasereconnect the air conditioner to power, then turn on it again.

4.4 Three-minute protection feature

 

● A protection feature prevents the air conditioner from being 

activated for approximately 3 minuites when it restarts 

immediately after operation.

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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