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1) Maintenance of fan :

One week after the unit is running, the elastic belt should be

re-adjusted, and should be inspected once every three months in

accordance with the requirements of inspection.

2) Maintenance of belt and pulley :

When the unit is running, check tension of the belt in a regular

time. Do the inspection job according to requirements of inspection

Tension adjustment of the belt: If the belt tension is proper, it will

help to avoid fan vibration, reduce noise and belt abrasion.

Customers should check belt tension every week and do

adjustment according to the following procedures if necessary:

a. Loosen the 4 fixed bolts of motor. Tighten or loosen the bolts

to move the motor.

b. Act in the middle of the belt perpendicularly with a finger.

Adjust belt tension until there's deflection distance, please refer to

Fig 3-2 If possible, it is better to use a tension frequency test

device, in order to get a more precise tension.

c. Tighten the fixed bolt of motor again.

Pulley revise: Fan pulley and motor pulley should on the same

plane, or it will consume much more energy and curtail service

life of belt. Every time after belt adjustment, you should check if

positions of the 2 pulleys are correct, refer to figure 3-3, you can

put a ruler on the same side of 2 pulleys to check if positions of 2

pulleys are correct. Check if point 1, point 2, point 3 and point 4

are in the same plane. If not, you can loosen fixed screws of fan

pulleys and along the fan axle to slide fan pulleys. Loosen motor

to adjust the angle on the fan slide way. Adjust to straightness

2mm.

3) When the unit is not running and heating system is not run-time in

the winter, the water must be drained out the coil (system) or add

the appropriate concentration antifreeze, otherwise the coil will be

frost crack.

4) Filter should be cleaned by using water or detergents depending

on the degree of dirt, cleaning frequency according to the using

environment, it is recommended a regular once a month.

5) For the units with humidifier, ECSE etc. special functions, pay

attention to read the components operation instructions along with

the unit, and do periodic check as the instructions.

6) A comprehensive maintenance should be taken every two years.

Chemical methods can be used to remove the scale in the coil, and

water or detergent can be used to clean the dirt on the surface of

the coil. Pay attention to check the water pipeline and wind duct for

sealing and insulation in order to reduce energy loss.

NOTE

1. Straightness requirements and tension requirements should be

satisfied at the same time after adjusting belt and pulleys.

2. When the service time has reached to 24 hours for the newly used

belt, you must check belt tension and adjust it properly. Improper

adjustment or no adjustment may result in belt lifespan reduction.

Even more it will cause belt fracture.

3. Belt is consumable. It is normal when after 6-months usage, the

belt is abraded and lose efficacy. You need to change a new belt at

this time. If multi-belts rotate, you should change the group of belts

simultaneously.

8 PHENOMENA NOT ATTRIBUTABLE TO

FAULTS OF AIR CONDITIONER

The following phenomena do not indicate exception of air

conditioner

The system does not run.

After pressing the ON/OFF button, the system does not run

immediately.

If the RUN indicator is on, it indicates the air conditioner runs in

the normal status.

It does not run immediately because the safety device in the

system is active to prevent overload.

Three minutes later, the air conditioner compressor will run

automatically.

If the RUN indicator and the Defrost/Preheat indicator are on, it

indicates you have selected the heating mode. At the beginning

after startup, since the compressor does not run, the tempera-

ture of the indoor unit is too low. See the chapter headed

"Cooling/Heating/Supply Air Operation Procedure".

The indoor unit gives out white aerosol

This phenomenon may occur when the indoor relative humidity

is too high and the unit runs in the cooling mode (in a place

where there is much oil mist or dust).

If the internal stain of the indoor unit is heavy, the temperature in

the room will be distributed unevenly. In this case, the interior of

the indoor unit must be cleaned.

Contact the local distributor or the aftersales service center of

manfacturer to inquire about the methods of cleaning the indoor

unit. This job must be performed by professional maintainers.

This phenomenon may also occur when the air conditioner

shifts from defrosting operation to heating operation.

That is because the moist generated by defrosting is expelled as

steam.

Noise of air conditioner

When the air conditioner runs in the cooling, dewetting or

heating mode automatically, grave continuous sizzles may

occur.

That is the sound of flow of refrigerant between the indoor unit

and the outdoor unit.

The sizzles may be heard shortly after the unit stops running or

when the unit runs in the defrost mode. That is the sound raised

because the refrigerant stops flowing or changes the volume of

flow.

Squeak may occur when the air conditioner starts or stops

running. That is the sound raised because the plastic assem-

blies inflate or deflate when the temperature changes.

Dust is blown out of the indoor unit.

When the air conditioner resumes service after a long period out

of service, the dust in the indoor unit will be blown out.

The indoor gives out smell

The indoor unit absorbs the smell of the room, furniture or

smoking, and gives it out when running.

Shift from cooling mode to air supply mode.

owner's manual