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will be energised. These control theHot GasValve in the
evaporators.
Micro
N1
S2
W3
Mode
DER
GPR
ENGINE OPERATION
Off
O
O
Glow
O
I
Start
O
O
High
Speed
O
O
Cooling
Low
Speed
O
O
Cooling
Off
O
O
cycle
Low
Speed
O
O
Heating
High
Speed
O
O
Heating
Defrost
O
O
STANDBY MOTOR OPERATION
Cooling
I
O
Off
I
O
cycle
Heating
I
O
Defrost
I
O
I = Output is ON
O = Output is OFF
1
Sequence shown is thermostat control selection. This may be overridden by suction pressure.
Relay
Valve
HGR1
HGV1
HGR2
HGV2
HGR3
HGV3
Table 3-11 Relay Operation - - Microprocessor Controller
RCR
SSR
SR
CAR
O
O
O
O
I
O
I
I
I
I
I
O
I
I
O
O
O
I
O
O
O
I
O
O
OI
I
O
I
I
O
I
I
O
O
O
I
O
O
O
I
O
O
O
I
O
O
O
Speed : (engine mode only) : when high speed is
needed, micro will energize SR relay (which controls
speed solenoid SCS) via N3 output.
CR
EHR
FLR
1,2,3
1,2,3
O
O
O
I
O
O
O
I
O
O
O
I
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
O
O
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O I or O
I
I or O I or O I or O I or O I or O I or O I or O I or O I or O I or O
I
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
O
O
O
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
O
I or O I or O I or O I or O I or O I or O I or O I or O I or O
3-6
EMR
HGR
LSV
RR
1,2,3
1,2,3
1,2,3
1,2,3
O
O
O
O
O
I
O
O
O
I
O
O
O
O
O
O
O
O
O
O
UFR
RBPR
850 /
MHR
850
950
Mt
Mt
O
O
O
I
O
I
I
O
I
O
O
O
O
O
O
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