SUPER DIGITAL
SUPER DIGITAL
SUPER DIGITAL
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11. REPLACEMENT OF SERVICE P.C. BOARD<br />
11-1. Indoort Unit<br />
<br />
The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P.C. board before replacement<br />
includes the model specific type information and capacity codes as the factory-set value and the important<br />
setting data which have been automatically or manually set when the indoor unit is installed, such as system/<br />
indoor/group addresses, high ceiling select setting, etc.<br />
When replacing the P.C. board for indoor unit servicing, follow the procedures below.<br />
After replacement completes, confirm whether the settings are correct by checking the indoor unit No., Group<br />
header unit/follower unit settings and perform the cooling cycle confirmation through the trial operation.<br />
<br />
CASE 1<br />
Before replacement, the indoor unit can be turned on and the setting data can be read out by<br />
wired remote control operation.<br />
EEPROM data read out [1]<br />
ò<br />
Replacement of P.C. board for Indoor unit servicing and power on [2]<br />
ò<br />
Writing the read out EEPROM data [3]<br />
ò<br />
Power reset<br />
(for all indoor units connected to the remote control when the group operation control is performed.)<br />
CASE 2<br />
The EEPROM before replacement is defective and the setting data cannot be read out.<br />
EEPROM data read out [2]<br />
ò<br />
Writing the setting data to EEPROM, such as high ceiling installation setting and<br />
optional connection setting, etc., based on the customer information. [3]<br />
ò<br />
Power reset<br />
(for all indoor units connected to the remote control when the group operation control is performed.)<br />
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