Board Exchange Procedures - Toshiba MML-AP0074H2UL Service Manual

Hide thumbs Also See for MML-AP0074H2UL:

Table of Contents

10. P.C. BOARD EXCHANGE PROCEDURES

Indoor unit

10-1.Replacement of indoor P.C. boards

Part code

431-6V-586

MML-AP

431-6V-587

MML-AP

Points to note when replacing indoor P.C. board assembly

The electrically erasable programmable read-only memory (hereinafter EEPROM, IC10) mounted on an indoor

P.C. board holds important setting data, including the type and capacity codes intrinsic to the model (set at the

factory), as well as the line / indoor / group addresses, high ceiling adjustment setting and the like (during

installation, either automatically or manually). Proceed with the replacement of an indoor P.C. board assembly

in accordance with the procedure described below.

After completion of the work, check the settings again, including the indoor unit No. and group header / follower

designation, and confirm the integrity of the refrigerating cycle by conducting a test operation, etc.

Method 1

If it is possible to turn on the indoor unit and read the setting data from the P.C. board to be replaced via a

wired remote control -

Reading EEPROM data: Procedure 1

Replacing P.C. board and turning on power: Procedure 2

Writing EEPROM data in new EEPROM: Procedure 3

Resetting power supply (applicable to all indoor units connected to remote control in case of group operation)

All manuals and user guides at all-guides.com

Model type

BH2UL

H2UL

– 81 –

P.C. board type

MCC-1403

Table of Contents