Toshiba MMU-P0121H Service Manual page 20

3-2-7. Confirmation and Check
n Confirmation of check No.
When an error/fault occur on the air conditioner, the check No. indicating the defective status can be confirmed
by the CHECK switch on the remote controller.
Before requesting repair, confirm the check No. in the following procedure, and contact the dealer with symptom
of the air conditioner.
[Confirmation procedure]
1. Hold the CHECK switch on the remote controller for 1 or 2 seconds. The "CHECK" display appears, and the
unit No. and check No. are displayed in the display section of set up TEMP.
2. The unit No. represents the number of indoor unit in which an error occurred.
3. Check No. is displayed as follows.
• When an error/fault does not occur.
• When one error/fault occurs.
• When two error/fault occur.
If you could not read the display sufficiently, push CHECK switch again.
n Check servicing
• Though differed according to use status, when the air conditioner has been used for several seasons, inside of
the air conditioner may be stained, and performance may decrease. Separated from daily maintenance, a
check servicing (charged) is recommended.
• The Ceiling cassette type air conditioner incorporates a drain pump. If it is used in an oily and dusty place, the
pump can be blocked causing the water drain to disable. It is required to clean the pump periodically.
For cleaning of drain pump, contact the dealer. (When a drain-up kit is attached to concealed duct type and
under ceiling type are same precautions are recommended.)
3-2-8. Accessories Sold Separately
When you require accessory or parts, consult us.
Be sure to use the products sold separately which are specified by us.
If using other products than those specified, a fire, electric shock or water leakage may be caused.
For installation, ask a special engineer.
CHECK
CHECK
1
CHECK
1
WARNING
3-17
CHECK
2