02-21
Protective function
Detect device
Operation
Cool Heat
Heatsink temp
sensor
Heatsink temp
sensor
Heatsink temp
sensor
Heatsink temp
sensor
Heatsink
temperature
protection stop
Display
EAC4
2-9-4 Heatsink temperature protection
Start condition
Release condition
Above 167
°F (75°C)
Below 167°F (75°C)
Cancel Fan speed
step down.
Heat sink
temperature
protection 1
Heat sink
temperature
protection 2
Compressor rotation speed
lessens- 10 rps/ 120sec.
Heat sink
temperature
protection 3
Above 181
°F (83°C)
Above 189
°F (87°C)
Below 181
°F (83°C)
Fan speed up 1 step
every 2 minutes.
(Pattern 1
Above 196
°F (91°C))
Pattern 2
Pattern 1 generated 3
times within 60 minutes
3 minutes elapsed,
and below 167
°F(75°C)
10 minutes elapsed,
and below 167
°F(75°C)
Compressor stops
Compressor stop
and Error indication.
Protective function
Detect device
Operation
Cool
Heat
Display
Compressor
temperature
protection stop
Compressor
temp.
sensor
<TH11>
EA31
P4
2-9-5 Compressor temperature protection
Start condition Release condition
Pattern 1
Compressor temperature
above 239
°F(115°C)
3 minutes have elapsed
and Discharge temp.
below 176
°F(80°C)
Corresponding outdoor
unit stops
Pattern 2
Pattern 1 generated 2
times within 40 minutes
Error reset (push button
SW) executed after
power reset.
Corresponding outdoor
unit stops (Permanent
stop) & Error display
2-9-6 O.U Heat - Ex.1(2) Gas Temp. abnormal stop
Protective function
Detect device Operation
Cool Heat
Display Start condition Release condition
Heat-Ex 1(2)
Gas temp.
Sensor
<TH7,TH8>
EA63
(Heat Ex1)
Heat Ex.1(2) gas temp. sensor
TH7 (TH8) for use as condenser
(4Way valve: Off, EEV: Open) is
detected abnormally-low to High
pressure saturated temp. for 4
minutes or more.
Error reset (push button
SW) executed after
power turned on
System Stop and
Error indication
O.U Heat - Ex.
1(2) Gas Temp.
abnormal stop
EA64
(Heat Ex2)
Below 167°F (75°C)
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