Troubleshooting - Toyotomi GAG-A128GVR Service Manual

Troubleshooting

code malfunctio
n
1 Storage
slug
2 Indoor
PCB
malfunctio
n
3 Anti-freezi
ng
protection
4 Overload
of system
5 No motor
of indoor
unit
feedback
6 Indoor
pipe
temperatur
e sensor
malfunctio
n
7 Internal
ambient
temperatur
e sensor
malfunctio
n
8 Zero
passage
abnormal
9 Overload
of
compresso
r
10 Startup
failure
11 No motor
of outdoor
unit
feedback
12 Overcurren
t
protection
13 4-way
valve
conversion
abnormal
14 Phase
current
detection
malfunctio
n
compresso
r
remarks 4min after protection stop of compressor, the malfunction is shown in error code. In other situation, the malfunction will be displayed by press the light button for 6 times within
4s.
Error display Repair method
Dual 8 LED
display
EE Heating LED-pause Replace indoor main
3s and blink 15 board
times
EE Heating LED-pause Replace indoor main
3s and blink 15 board
times
E2 Running LED- Outdoor
pause 3s and blink 2 temperature is too low
times
H4 Heating LED-pause System is abnormal,
3s and blink 4 times check if the evaporator
and condenser is dirty
and blocked
H6 Running LED- Is
pause 3s and blink mounted normally?
11 times
F2 cooling LED- pause Is it loose? Measure
3s and blink 2 times the
with universal meter
F1 Cooling LED- pause Is it loose? Measure
3s and blink 1 times the
with universal meter
UF Heating and cooling Replace indoor main
LED blinks 7 times board
at the same time
H3 heating LED- pause Inspect
3s and blink 3 times state of the overload
wire.
Lc heating LED- pause Check if the resistance
3s and blink 11 of
times resistance to ground is
normal.
compressor is normal,
the outdoor main boar
d may be wrong.
UH Heating and cooling This malfunction may
LED blink 8 times at happen when outdoor
the same time DC
used.
E5 Running LED- Is
pause 3s and blink 5 variable?
times
U7 cooling LED- pause Replace 4-way valve.
3s and blink 20
times
U1 Heating LED- pause Replace outdoor main
3s and blink 13 board.
times
of
co malfunction
de
15 Sync failure
16 Current diction
malfunction
complete unit
ambient 17 Outdoor ambient
temperature sensor
malfunction
18 Discharge
protection
compressor
electromotor 19 Break-circuit and
short-circuit
outdoor discharge
temperature sensor
20 Break-circuit and
resistance value short-circuit
outdoor condenser
temperature sensor
21 Overheat of carbon
resistance value fin
22 DC overcurrent
connection 23 Temperature sensor
malfunction
carbon fin
24 Lack of Freon or
compressor and block protection
If the
25 DC input voltage is
too high
electromotor is
electric network 26 DC input voltage is
too low
27 Communication
malfunction
28 Setting error,
indoor and outdoor
unit abnormal
Error display Repair method
Dual 8 LED
display
H7 Heating Check if the resistance
LED-pause 3s and of
blink 7 times resistance to ground is
normal.
compressor is normal,
the outdoor main boar
d may be wrong.
U5 Cooling Replace outdoor main
of LED-pause 3s and board
blink 13 times
F3 Cooling Is it loose? Measure
LED-pause 3s and the
blink 3 times with universal meter
E4 Running Is it loose? Measure
of LED-pause 3s and the
blink 4 times with universal meter
F5 cooling LED- Is it loose? Measure
of pause 3s and blink the
5 times with universal meter
F4 cooling LED- Is it loose? Measure
of pause 3s and blink the
18 times with universal meter
P8 heating LED- Is outdoor
pause 3s and blink temperature
19 times high?
mounted correctly?
UU Heating and
cooling LED blink
11 times at the
same time
P7 heating LED- Replace outdoor main
board.
of pause 3s and blink
18 times
F0 cooling LED-
pause 3s and blink
10 times
PH cooling LED- Is voltage of AC power
pause 3s and blink supply normal?
11 times
PL Heating LED- Is voltage of AC power
pause 3s and blink supply normal?
21 times
E6 Running LED- Is outdoor connecting
pause 3s and blink wire
6 times connected?
UA Heating and Outdoor unit is not
cooling LED blink matched with indoor
12 times at the unit.
same time
compressor and
If the
resistance value
resistance value
resistance value
resistance value
ambient
is too
Is radiator
reliably
41