Friedrich H)A18K34L ユーザーズマニュアル

30

1.

2.

3.

4.

5.

Turn off electric power before service or 

installation.

Failure to do so may result in personal injury, 

or death.

Sealed Refrigeration System contains refrigerant 

and oil under high pressure.

Proper safety procedures must be followed, 

and proper protective clothing must be worn 

when working with refrigerants.

Failure  to  follow  these  procedures  could 

result in serious injury or death. 

The use of nitrogen requires a pressure

regulator. Follow all safety procedures and 

wear protective safety clothing etc. 

Failure to follow proper safety procedures 

result in serious injury or death. 

Recover all refrigerant and oil from the system.  

 

Remove compressor, capillary tube and filter drier  

from the system.  

 

Flush evaporator condenser and all connecting 

tubing with dry nitrogen or equivalent. Use approved 

flushing agent to remove all contamination from 

system. Inspect suction and discharge line for 

carbon deposits. Remove and clean if necessary. 

Ensure all acid is neutralized. 

 

Reassemble the system, including new drier strainer 

and capillary tube. 

Proceed with step 8-10 on previous page. 

Turn  off  electrical  power  before  service  or 

installation. All eletrical connections and wiring 

MUST  be  installed  by  a  qualified  electrician 

and conform to the National Code and all local 

codes which have jurisdiction. Failure to do so 

can result in property damage, personal injury 

and/or death.

To ensure proper unit operation and life expectancy, the 

following maintenance procedures should be performed 

on a regular basis 

1. Air Filter  

To ensure proper unit operation, the air filters should 

be cleaned at least monthly, and more frequently if 

conditions warrant. The unit must be turned off before 

the filters are cleaned. 

To remove the air filters, grasp the top of the filter and lift 

out of the front cabinet.  Reverse the procedure to reinstall 

the filters. 

Clean the filters with a mild detergent in warm water, and 

allow them to dry thoroughly before reinstalling. 

2. Coils & Chassis  

NOTE: Do not use a caustic coil cleaning agent on coils 

or base pan. Use a biodegradable cleaning agent and 

degreaser. The use of harsh cleaning materials may 

lead to deterioration of the aluminum fins or the coil end 

plates. 

The  indoor  coil  and  outdoor  coils  and  base  pan  should 

be  inspected  periodically  (annually  or  semi-annually) 

and  cleaned  of  all  debris  (lint,  dirt,  leaves,  paper,  etc.) 

as necessary. Under extreme conditions, more frequent 

cleaning  may  be  required.    Clean  the  coils  and  base 

pan  with  a  soft  brush  and  compressed  air  or  vacuum.  

A  pressure  washer  may  also  be  used,  however,  you 

must be careful not to bend the aluminum fin pack. Use 

a  sweeping  up  and  down  motion  in  the  direction  of  the 

vertical aluminum fin pack when pressure cleaning coils. 

Note: It is extremely important to insure that none of the 

electrical and/or electronic parts of the unit get wet.  Be 

sure  to  cover  all  electrical  components  to  protect  them 

from water or spray. 

The decorative front and discharge air grille may be 

cleaned with a mild soap or detergent.  Do NOT use 

solvents or hydrocarbon based cleaners such as 

acetone, naphtha, gasoline, benzene, etc., to clean the 

decorative front or air discharge grilles. 

Use  a  damp  (not  wet)  cloth  when  cleaning  the  control 

area to prevent water from entering the unit, and possibly 

damaging the electronic control 

4. Fan Motor & Compressor  

The fan motor & compressor and are permanently 

lubricated, and require no additional lubrication. 

Inspect the inside of the wall sleeve and drain system 

periodically (annually or semi-annually) and clean as 

required.  Under extreme conditions, more frequent 

cleaning may be necessary.  Clean both of these areas 

with an antibacterial and antifungal cleaner.  Rinse both 

items thoroughly with water and ensure that the drain 

outlets are operating properly.