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11. REPLACEMENT OF SERVICE INDOOR P.C. BOARD
[Requirement when replacing the service indoor P.C. board assembly]
In the non-volatile memory (Hereinafter said EEPROM, IC10) installed on the indoor P.C. board before replace-
ment, the type and capacity code exclusive to the corresponding model have been stored at shipment from the
factory and the important setup data such as system/indoor/group address set in (AUTO/MANUAL) mode or
setting of high ceiling selection have been stored at installation time. Replace the service indoor P.C. board
assembly according to the following procedure.
After replacement, check the indoor unit address and also the cycle by a test run.
<REPLACEMENT PROCEDURE>
CASE 1
Before replacement, power of the indoor unit can be turned on and the setup data can be readout from
the wired remote controller.
Read EEPROM data *1 (ref. P89)
ò
Replace service P.C. board & power ON *2 (ref. P89)
ò
Write the read data to EEPROM *3 (ref. P90)
ò
Power reset (All indoor units in the group when group operation)
CASE 2
Before replacement the setup data can not be readout from the wired remote controller.
Replace service P.C. board & power ON *2 (ref. P89)
ò
Write the data such as high ceiling setup to EEPROM (According to the customers’ information) *3
ò
Power reset (All indoor units in the group when group operation)