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 (AUTO/
MANUAL) mode have been stored at installation.
Replace the service indoor P.C. board assembly according to the following procedure.
After replacement, make sure that the indoor unit address is set correctly and also the refrigerant cycle is
working correctly by test operation.
<Replacement procedure>
CASE 1
Before replacement, power of the indoor unit can be turned on and the setup data can be readout
by the wired remote controller.
Read EEPROM data (see
1
)
Ø
Replace service P.C. board & power ON (see
2
)
Ø
Write the read data to EEPROM (see
3
)
Ø
Power reset
(If in group operation, reset the power for all indoor units which are connected to the remote controller.)
Case 2
Before replacement, the setup data can not be read out by the wired remote controller.
Replace service P.C. board & power ON (see
2
)
Ø
Write the data such as “Option input selection” setup to EEPROM (see
3
)
(According to the customers’ information)
Ø
Power reset
Model type
MMK-AP
∗∗∗
7HP series
P.C. board model
MCC-1
696
FILE NO. SVM-17045
- 112 -
FILE NO. SVM-17045
- 112 -
