Service manual

12-19
CONTROL SYSTEM
SM CINCO 1-A.1 GB
ODUCodeH setting:
-15 -5 15
ODUCodeH
OAT2 2421
A
B
C
D
E
Point (Set by the graph above) ODUCodeH
A 2.0
B 2.5
C (or OAT faulty) 3.5
D 4.0
E 4.5
ODUCodeC setting:
ODUCodeC
ALL 3.0
12.5.3 EEV Control
12.5.3.1 EEV General Rules
The EEV is controlled to keep the discharge superheat temperature within preset control values.
12.5.3.2 EEV initialization procedure
After power up, the EEVs perform initialization procedure while it closed completely and reopened to predefined
position.
12.5.3.3 Balance time
During the first 5 minutes after SB the correction is not calculated. After that the correction value is updated every
EEVCVTConst seconds.
12.5.3.4 Operation Range
The EEV operation range is defined according to the operation mode as following:
ODU Mode
EEV1/EEV2/EEV3/EEV4/EEV5 Main EEV
Active IDU Inactive IDU
COOL 50-480 0
0
HEAT
50-480 90-120
De-ice 160
Cool/Heat/Idle 400
12.5.3.5 EEV initial value determination (EEVOLi)
EEVOLi = EEVCpctyCrct + EEVFreqCrct + EEVOATCrct
The EEV initial value (open loop) is determined according to the operation mode, the actual frequency and
outdoor conditions. The values are determined according to the predefined parameters.