– 31 –
1. DPS (Dual pressure switch) operates ···· The unit
stops.
High pressure side
OFF : 2.94MPa (30.0kgf/cm
2
)
ON : 2.35MPa (24.0kgf/cm
2
)
Low pressure side
OFF : 0.20MPa (2.0kgf/cm
2
)
ON : 0.23MPa (2.3kgf/cm
2
)
•
The alarm lamp lights (red).
•
All relays are dropped out.
2. F
1
(fuse) is blown ···· The unit stops.
•
The alarm lamp lights (red).
•
All relays are dropped out.
3. F
2
(fuse) is blown ···· The unit stops.
•
The alarm lamp lights (red).
•
All relays are dropped out.
4. F
3
(fuse) is blown ···· The unit stops.
•
The alarm lamp lights (red).
•
All relays are dropped out.
5. FL (fusible link) is blown ···· The unit stops.
6. TD (Td sensor) operates ···· The unit stops.
("OFF" at compressor delivery temperature 135°C
and "ON" at 125°C)
•
The alarm lamp lights (red).
•
AR
1
(thermostat relay) is de-energized, MCL
1
(magnet clutch) is disconnected, and the
compressor stops.
•
AR
4
(condenser fan motor relay) is de-
energized, FM
2
(condenser fan motor) is
disconnected, and the condenser fan motor
stops.
Remarks: (1) When alarm lamp lights, the defects
will be shown on the display when
alarm lamp is lit, press the alarm
switch, and the defects will be
shown on the display.
DPS operates ························
F
1
is blown ····························
F
2
is blown ····························
F
3
is blown ····························
TD operates ··························
Storage temperature sensor defect
·········································
(2) When pressure and temperature
drops, DPS and TD automatically
operate again.
(The light goes out if the operation
switch is turned "OFF".)
D Operation of protection device
