Installation manual
38GL_M…G / 38YY(S)_M…G
R-410A
GB - 20
The electronic control made on the unit ensures continuous
monitoring of the unit operation and in case of wrong operation an
alarm is generated. This alarm is signalled by the red LED (D6),
which the electronic card is provided with. Moreover, an alarm log is
stored into the electronic card memory, and it will be identified by a
code. The memory contains a maximum of 6 alarms. Dip Switch 4
OFF
[1]
(S1):
if no alarm is generated, the red LED blinks to indicate
normal operation (1 second ON and 1 second OFF). In the event of
an alarm, the red LED OFF blinks for 2.5 sec. and then for a
number of times equal to the number of the alarm code, for 0.5
Diagnostics
seconds ON and for 0.5 seconds OFF. The code sequence is
followed by 2 seconds during which the LED is OFF. When the last
alarm is coded the alarm sequence will start from the first alarm
being detected.
The diagnostics indicates the detected alarms but not their number.
Dip Switch 4 ON (S1): the log of the alarms contained in the
memory is signalled by the red LED that blinks as many times as
the alarm code number. If no alarms are detected, the code being
signalled is “1”. There follows a list describing the possible cause of
each alarm code:
Alarm
Alarm
code
Description Action reset Possible cause
mode
1 No alarm stored
.
No action Automatic No cause
2 Faulty outdoor air Unit is stopped Automatic Sensor is out-of-scale, or not
temperature sensor. connected to the card, sensor wires
are cut or sensor is faulty.
3 Circuit “A” coil Unit is stopped Automatic Sensor is out-of-scale, or not
temperature sensor is faulty. connected to the card, sensor wires
are cut or sensor is faulty.
4 Circuit “B” coil Unit is stopped Automatic Sensor is out-of-scale, or not
temperature sensor is faulty. connected to the card, sensor wires
are cut or sensor is faulty.
5 Parameter diagnostics Unit is stopped Automatic EEprom “U11” is faulty or wrongly installed on
the card. Card end of line test aborted.
6 Wrong input signal Unit is stopped Automatic Cables Y-O-W2 reversed on the
connection terminal block or on the “J4” card.
Indoor units not configured as multisplit units.
WARNING: By passing Dip Witch 4 (S1) from the ON to the OFF position for three times in 5 seconds, the alarm log is cancelled.
At the end of this operation, put the Dip Switch 4 (S1) in the OFF position.
• To operate testing follow the instructions contained in the indoor
units installation manual.
Testing
• For multisplit systems testing can be carried out only if made on
one circuit at a time.
Example of alarm code 2 followed by alarm code 3:
Led off Led on
[1]
Position selected at the factory.
Pause
of 2.5
sec.
Alarm
code
2
Pause
of 2
sec.
Alarm
code 3
Pause
of 2
sec.
Connector
J4
Led D6
Electronic card
EEprom
U11
Dip
switch
S1
(1): 1 part - (2): two parts
Table VI: Accessories
Description Part number
38GL_M…G 38YY-M...G
2M12G 2M18G 2M24G 2M36G 2M48G 3M21G 4M24G 2M18G 2M24G
Wall bracket kit
38YL-900---002-40
앬
Wall bracket kit
38YL-900---001-40
앬앬 앬앬
PTC starting kit
38YL-900---010-40
앬앬앬 앬앬
Low temperature kit
38GLX9001
앬앬
Low temperature kit
38GLX9002
앬
Low temperature kit
38GLX9004
앬앬 앬
(2)(2)
(2)(2)
(1)
(1)
(1)
(1)(2)(2)
(1)