Specifications

by johnson controls
19
Troubleshooting
16
Refrigerant
insufciency
or blockage
protection
(available for
the residential
outdoor unit)
Refrigerant
insufciency
or blockage
protection
(available for
the residential
outdoor unit)
F0 /
Flash 10
times
/ oE oE
Short/open
circuit of the
indoor ambient
temperature
sensor
Short/open
circuit of the
indoor ambient
temperature
sensor
Shown
as Table
16
/
Flash
once
/ F1 F1
Short/open
circuit of
the indoor
evaporator
Short/open
circuit of
the indoor
evaporator
Shown
as Table
16
/
Flash
twice
/ F2 F2
Short/open
circuit of the
of the outdoor
ambient
temperature
sensor
Short/open
circuit of the
of the outdoor
ambient
temperature
sensor
F3 /
Flash 3
times
/ F3 F3
Short/open
circuit of the
temperature
sensor at the
midway of
the condenser
coil ( for the
commercial unit)
Short/open
circuit of the
temperature
sensor at the
midway of
the condenser
coil ( for the
commercial unit)
F4 /
Flash 4
times
/ F4 F4
Short/open
circuit of
the outdoor
discharge
temperature
sensor
Short/open
circuit of
the outdoor
discharge
temperature
sensor
F5 /
Flash 5
times
/ F5 F5
Oil returning
in cooling
Oil returning
in cooling
F7 / / / / /
System high
pressure
protection
System high
pressure
protection
E1
Flash
once
/ / E1 E1
Anti-freezing
protection
Anti-freezing
protection
E2
Flash
twice
/ / E2 E2
System low
pressure
protection
(reserved)
System low
pressure
protection
E3
Flash 3
times
/ / E3 E3
Compressor
discharge high
temperature
protection
Compressor
discharge high
temperature
protection
E4
Flash 4
times
/ / E4 E4
Whole unit
over-current
protection
Whole unit
over-current
protection
E5
Flash 3
times
Flash 3
times
Flash 3
times
oE oE
Communication
error between
the indoor and
outdoor units
Communication
error between
the indoor and
outdoor units
Shown
as Table
16
Flash 6
times
/ / E6 E6