En-19
External output
101 21
Wiring of connector
101 21 11
When installing connection cable, specified part (optional parts) must be used.
Output
Connector
Error status
CN951
Compressor status
CN952
+
+
-
Circuit diagram example
Outdoor unit
control PC board
Connected unit
(Field supply)
Connection
cable
Signal
*10 m
Connector
Load
Vcc
Vcc
Power
supply
CN951
CN952
1
1
2
2
* Make the distance from the PC board to the connected unit within 10m.
1) Power supply
• Voltage (Chart sign=Vcc) : DC 24V or less
2) Load
• Load : DC 500mA or less is recommended
Error status output (CN921)
101 21 21
An air conditioner error status signal is produced when a malfunction occurs.
Error status
Output signal
Error
ON
Normal
OFF
Compressor status output (CN922)
101 21 21
Compressor operation status signal is produced when the compressor is
running.
Compressor status
Output signal
Operation
ON
Stop
OFF
Base heater
101 21 41
When installing connection cable, specified part (optional parts) must be used.
This output signal is produced when the outdoor temperature drop down to
2°C, and releases at 4°C.
Circuit diagram example
1
2
3
4
connected unit
P.C.B
AC240V
CN206
*1
*2
Base heater
Connector
1
2
3
4
connected unit
Base heater
Connector
P.C.B
AC240V
CN206
*1
*3
*1: Connect to pin 1 and pin 3. No connection pin2 and pin4.
*2: The allowable power consumption is 25W or less.
*3: If a load greater than 25W is applied, a contactor or relay should be
used to operate and control the base heater.
LED Display
111
You can determine the operating status by the lighting up and blinking of the LED lamp.
Check the status using the table below.
Normal operation mode
111 11
CODE
DESCRIPTION
C L
Cooling
H
t
Heating
o
r During oil recovery operation
d F During defrosting operation
P C During power saving operation
L n During low noise operation
Error display mode
111 21
When error occurs, “Err” and “Number of errors occurred” are alternately displayed
•
on the 7 seg. display.
The latest error code can be confirmed by pressing the ENTER button.
•
When error codes are displayed, all the error codes can be confirmed by pressing
•
the SELECT button.
When the error display appears even though the measures for error are taken,
•
switch on the power again after turning off the power. When the power is turned on
again after turned off, wait approx. 10 minutes and turn on the power again.
Example: When “Discharge thermistor error” and “Compressor thermistor error”
occurred
: Press the “SELECT” button.
SELECT
SELECT
ENTER
ENTER
: Press the “ENTER” button.
CODE
DESCRIPTION
E 1
1
3
Serial communication error
E 1
1
4
E 1
5
6
Check run unfinished
E 2
1
2 Wiring mistake
E 2
2
1 Indoor unit capacity error
E 2
4
2
Connection unit number error (indoor unit)
E 2
4
3
Connection unit number error (branch unit)
E 5 U 1 Indoor unit error
E 6
2
1 Outdoor unit P.C.B. model information error
E 6
3
1 Inverter error
E 6
4
1
Active filter error, P.F.C. circuit error
E 6
5
3 Trip terminal L error
E 6 A 1 Display P.C.B. communication error
E 7
1
1 Discharge temp. sensor error
E 7
2
1 Compressor temp. sensor error
E 7
3
3 Outdoor unit Heat Ex. liquid temp. sensor error
E 7
4
1 Outdoor temp. sensor error
E 7
5
1 Suction gas temp. sensor error
E 7
7
1 Heat sink temp. sensor error
E 8
2
1 Sub-cool Heat Ex. gas inlet temp. sensor error
E 8
2
2 Sub-cool Heat Ex. gas outlet temp. sensor error
E 8
3
1 Liquid pipe temp. sensor error
E 8
4
1 Current sensor error
E 8
6
1 Discharge pressure sensor error
E 8
6
3 Suction pressure sensor error
E 8
6
4
High pressure switch error
E 9
4
1 Trip detection
E 9
5
1 Compressor rotor position detection error
E 9
7
3 Outdoor unit fan motor error
E 9
9
1
4-way valve error
E A 1
1 Discharge temperature error
E A 3
1 Compressor temperature error
E A 5
1 Low pressure error
E J
2 U Branch boxes error
Note : Even if error is solved while displaying error codes, the 7 seg. display
continues to display the error codes. Please confirm the error has been
recovered by checking normal display.
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