Instruction manual

INSTALLATION INSTRUCTIONS R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)
18 421 01 9220 00
UNIT 18K & 24K, 230 Volts (Cont.)
Malfunction
Indoor Unit Display
Outdoor unit display
(LED’s have 3 modes)
OFF, ON, Flash
Operation Status Malfunction
Error
Code
Display
Indicator Display
(LED Flash 0.5s−ON/0.5s−OFF
Running
LED
Cooling
LED
Heating_
LED
D40
/D5
D41
/D6
D42/
D16
D43/
D30
PFC protection HC
3s off flash
6 times
 
 
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Refer to service
manual
Compressor speed
reduction
H7
3s off flash
7 times




Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Refer to service
manual
Heating, high temp H0
3s off flash
10 times
 
 
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Refer to service
manual
Start−up failure LC
3s off flash
11 times




Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Refer to service
manual
Compressor current
circuit malfunction
U1
3s off flash
13 times


 
Replace outdoor
board AP1
EEPROM malfunction EE
3s off flash
15 times
   
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Replace outdoor
board AP1
Capacity charge
malfunction
PU
3s off flash
17 times
   
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Refer to capacitor
charging service
manual
Module Sensor circuit
malfunction
P7
3s off flash
18 times
  

Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Replace the outdoor
boar AP1
Module over temp
protection
P8
3s off flash
19 times
 


Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Check the IPM heat
sink or replace
outdoor board AP1
Low DC bus voltage U3
3s off flash
20 times
   
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
Supply voltage is not
stable
Low DC bus voltage
protection
PL
3s off flash
21 times
   
Cooling,
dehumidifying;
compressor stops,
indoor fan motor
runs, heating all stop.
1. Check supply
voltage, if voltage
lower than 150VAC,
restart the unit when
the power supply is
normal.
2. Check reactor L
connection
IPM temp high
limit/decrease
compressor run speed
EU
  

Operation normal,
compressor speed
reduced
Check the IPM heat
sink or replace
outdoor board AP1
Four−way valve
malfunction
U7
 


In heating mode, all
stop
1. Supply voltage is
lower than AC175vV
2. 4−way valve
terminal loose/broken
3. 4−way valve
damaged