FUJITSU GENERAL AMERICA, INC
353 Route West. Fairfield, NJ 07004
Ph: 973-575-0381 Fx: 973-836-0449
Em: ServiceHVAC@fujitsugeneral.com
SERVICE BULLETIN
Number: 0030
Date: 9/25/14
TYPE: Field
PROBLEM Low Load Cooling / Heating Function Setting
SOLUTION Updated Firmware – Replacement Indoor Control Boards
MODEL: ASU7RLF1, ASU9RLF1, ASU12RLF1,
ASU9RL2, ASU12RL2, ASU9RLS2, ASU12RLS2,
ASU18RLF, ASU24RLF, AUU7RLF, AUU9RLF,
AUU12RLF, AUU18RLF, ARU7RLF, ARU9RLF,
ARU12RLF, ARU18RLF, ARU24RLF, AGU9RLF,
AGU12RLF, AGU15RLF
Production Serial Numbers:
Reference Table Below
Objective:
As a result of several case studies it has become apparent that homes with high levels of insulation require a different capacity control
algorithm in order to improve occupant comfort, and improve energy efficiency. This firmware update provides the contractor with the
ability to select between standard insulation and high insulation level home settings. The above mentioned models can be retrofitted
with a replacement board. Should you want the new firmware, reference the serial number list on the attached table, look for your model
and serial number to see if your unit already has the firmware update. If your unit is not on the list then the firmware is already installed
from factory and you can simply set the following function setting as needed. If your unit is on this list you will need to place an order for
a replacement board, which will be covered under our standard 5 year parts warranty, and conduct the following settings.
Room Temperature Sensor Control:
•Depending on the installed environment, correction of the room temperature sensor may be required.
•Select the appropriate control setting according to the installed environment.
•The temperature correction values show the difference from the standard setting “00” (manufacturer's recommended value).
Function Number Setting Value Setting Description
95
00 Standard insulation
◆
01 High insulation
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Model Serial Range Part Number Board Identification
ASU7RLF1 MWA00000 - MWA19379 K9709427354 K12JY-1402HSE-C1
ASU9RLF1 MXA00000 - MXA026182 K9709427330 K12JY-1402HSE-C1
ASU12RLF1 MYA000000 - MYA026820 K9709427347 K12JY-1401HSE-C1
ASU9RL2 EYA000000 - EYA007211 K9709170298 K11CN-1403HSE-C1
ASU12RL2 EYA000000 - EYA012671 K9709170304 K11CN-1404HSE-C1
ASU9RLS2 JQA000000 - JQA020146 K9708713410 K10CH-1401HSE-C1
ASU12RLS2 JRA000000 - JRA033554 K9708713427 K10CH-1402HSE-C1
ASU15RLS2 JSA000000 - JSA034491 K9708713434 K10CH-1403HSE-C1
ASU18RLF KSA000000 - KSA051177 K9708540368 K09DR-1403HSE-C1
ASU24RLF KTA000000 - KTA033603 K9708540375 K09DR-1404HSE-C1
AUU7RLF MVA000000 - MVA001421 K9709928011 K06AK-1400HSE-C1
AUU9RLF KUA000000 - KUA009021 K9709928028 K06AK-1401HSE-C1
AUU12RLF KVA000000 - KVA007667 K9709928035 K06AK-1402HSE-C1
AUU18RLF KWA000000 - KWA005975 K9709928042 K06AK-1403HSE-C1
ARU7RLF MUA000000 - MUA001442 K9709928059 K06AK-1404HSE-C1
ARU9RLF KYA000000 - KYA005911 K9709928066 K06AK-1405HSE-C1
ARU12RLF LNA000000 - LNA 007370 K9709928073 K06AK-1406HSE-C1
ARU18RLF LPA000000 - LPA007561 K9709928080 K06AK-1407HSE-C1
ARU24RLF LQA000000 - LQA003592 K9709928097 K06AK-1408HSE-C1
(
◆
… Factory Setting)
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