61
Service Manual
Installation and Maintenance
The unit does not operate
after energiztion.
Fuse is burnt out. Replace fuse.
Transformer is broken.
Replace transformer.
Rectifier diode is broken. Replace rectifier diode.
Overheating  of 
compressor activates 
the protector.  
The refrigerant is inadequate or 
excessive. 
Capillary is blocked so the suction 
temperature increases. 
Adjust amount of refrigerant. 
 
Replace capillary 
Replace compressor 
Check if the contact is conducting when the 
compressor is not overheated. If not, replace 
the protector.   
The  compressor  doesn't  operate  normally 
 or the discharge valve is damaged. 
Malfunction of the protector 
Remote controller is 
not working.
Adjust receiver.
Receiver is loose.
Replace receiver or adjust the receiver wire.
Receiver is broken or is not connected well.
Replace remote controller.
Malfunction of the controller.
Remote reveiving
 ecnatsid    is too short
Battery's electricity is insufficient 
Replace the battery
F1 displays on double-8 
nixie tube of display board
Unreliable connection of AC ambient 
temp. sensor onto controller
Reconnect them or replace the  temp. sensor
F2 displays on double-8 
nixie tube of display board
Unreliable connection of AC tube 
temp. sensor onto controller
Reconnect them or replace the  temp. sensor
Note: The information above is for reference only.