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Alarm Code is composed of two parts. First part is a letter, second part is a number:
The blinking of LED 1 indicates the code letter The blinking of LED 2 indicates the number
LED 1 LED 2
Number of Blinks Alarm Code Letter Number of Blinks Alarm Code Number
0 No alarm 0 No alarm
2 P 1 1
3 H 2 2
4 E …. ….
5 F 16 16
6 L
17 17
Examples: (other than E15, E16 and E20)
Alarm code LED 1 alternately LED 2
P04 Blinks twice = P Blinks four times = 04
-
H01 Blinks three times = H Blinks once = 01
-
E03 Blinks four times = E Blinks three times = 03
-
F07 Blinks five times = F Blinks seven times = 07
-
L09 Blinks six times = L Blinks nine times = 09
-
LED 1 & 2 – Other indications:
LED 1 LED 2 Remarks
Power ON sequence
Step 1 : no communication A3 / A2
Step 2 : communication received from A2
Step 3 : normal communication
On
Off
Off
On
On
Off
In normal operation
A3 EEPROM error (F31)
Pre trip (insufficient gas)
Pre-trip (P20 - HP)
Pre-trip (other)
On
Blinks (0.25/0.75)
Blinks (0.75/0.25)
Blinks (0.5/0.5)
Blinks (0.5/0.5)
Off
Off
Off
During auto address & initial
communication ; then F31 displayed.
P03
Alarms Blinks Blinks See details in table before
Insufficient refrigerant indicator Blinks (0.5/0.5) Off
Refrigerant recovery mode Blinks (0.5/0.5) On Not used – only for split heat pumps
Automatic address setting (A3 – A2)
Automatic address setting in progress
Automatic address setting alarm (E15)
Automatic address setting alarm (E20)
Automatic address setting (other than E15/E20)
Blinks (0.5/0.5)
Blinks (0.25/0.75)
Blinks (0.75/0.25)
Blinks (0.5/0.5)
Blinks (0.5/0.5)
Blinks (0.25/0.75)
Blinks (0.75/0.25)
Blinks (0.5/0.5)
Blinking alternately
Blinking simultaneously
Blinking simultaneously
Blinking simultaneously
Note: blinking (0.25/0.75) means that LED illuminates for 0.25 seconds and then is Off for 0.75 seconds.
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