Test Run and Others
5
TD831077
V-8
7 Alarm messages on the outdoor P.C.B.
When the outdoor alarm LED (yellow) is OFF and the alarm display LED (red) lamps blink → Operation thermostat OFF,
with no alarm display on the remote controller.
When the outdoor alarm LED (yellow) is ON and the alarm display LED (red) lamps light up → An alarm message is also
displayed on the remote controller.
1. Test Run
LED (red)
O: light ON / blinking ●: light OFF
Alarm message
Outdoor unit
PC unit
87654321
E25 ● O ● OO●●O
E29 ● O ● OOO● O
E30 ● O ● OOOO●
F04 ● OO●●O ●●
F05 ● OO●●O ● O
F06 ● OO●●OO●
F07 ● OO●●OOO
F08 ● OO● O ●●●
F22 ● OOO● OO●
H25 O ●●OO●●O
F23 ● OOO● OOO
F24 ● OOOO●●●
F25 ● OOOO●●O
P02 OOO●●●O ●
P04 OOO●●O ●●
H06 O ●●●●OO●
P05 OOO●●O ● O
P03 OOO●●●OO
P17 OOOO●●●O
P18 OOOO●●O ●
H01 O ●●●●●●O
H02 O ●●●●●O ●
H03 O ●●●●●OO
F27 ● OOOO● OO
H09 O ●●●O ●●O
H11 O ●●●O ● OO
H12 O ●●●OO●●
H13 O ●●●OO● O
F28 ● OOOOO●●
H19 O ●●O ●●OO
Duplication of outdoor
unit address
Receiving error signal
Transmitting error signal
Sensor fault
Protective device
activated
High-pressure switch
Low-pressure switch
Negative phase
Incorrect discharge
temperature
PC comp. CT detection
current
AC comp. CT detection
current
AD unit
Duplication of outdoor unit
address
Outdoor P.C.B. receives error
signal
from CCU
Outdoor P.C.B. transmits error
signal to CCU
Discharge temp. (PC comp.): TH1
Discharge temp. (AC comp.): TH2
No. 1 coil gas temp.
: TH7
No. 1 coil liquid temp.
: TH4
Outside air temp.
: TH9
Discharge temp. (SC comp.): TH3
Improper installation of discharge
temp. sensor (SC comp.): TH3
No. 2 coil gas temp.: TH8
No. 2 coil liquid temp.: TH5
Coil temperature: TH6
Fan motor protection
thermostat
PC, AC, SC comp. protection
thermostat
Defective phase
Power supply voltage is unusual
PC, AC, SC comp.
SC comp.
Negative phase
PC comp.
AC comp.
SC comp.
Overload current
Lock current
Current is not detected when
compressor is ON
Current is detected when
compressor is OFF
MG SW is chattering
Overload current
Lock current
Current is not detected when
compressor is ON
Current is detected when
compressor is OFF
MG SW is chattering
Duplication of outdoor unit
address
Outdoor P.C.B. receives
error signal from CCU
Outdoor P.C.B. transmits
error signal to CCU
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Coil gas temp.: TH4
Coil liquid temp.: TH2
Outside air temp.: TH5
Discharge temp.: TH1
Improper installation of
discharge temp. sensor: TH1
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Coil temperature: TH3
Fan motor protection
thermostat
Compressor protection
thermostat
Defective phase
Power supply voltage
is unusual
Compressor
Compressor
Negative phase
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Compressor
----------
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∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
NOTE
∗: Alarm display LED lamps may all be lit up or all blink at once.
(Without∗: light up all at once only)
● CCU : Command control unit (incorporated in outdoor unit)
● PC unit : Power control unit
● AD unit : Additional unit
● PC comp. : Power control compressor
● AC comp. : Constant speed compressor
● SC comp. : Scroll compressor
Remote
controller
display
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