Caution For Pump Down; Meaning Of Alarm Messages - Technibel CAFM1V Series Technical Data Manual

2. Test Run

2-5. Caution for Pump Down

Pump down means refrigerant gas in the system is
returned to the outdoor unit. Pump down is used
when the unit is to be moved, or before servicing the
refrigerant circuit.
CAUTION

2-6. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of Alarm Displays
Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on
the wired remote controller.
 Viewing the LED 1 and 2 (D72 and D75) alarm displays
LED 1 LED 2
Alarm display
Alternating
( : Blinking)
Possible cause of malfunction
Remote controller is detecting
Serial commu-
error signal from indoor unit.
nication errors
Mis-setting
4
Indoor unit is detecting error signal from remote controller (and system controller).
Indoor unit is detecting error
signal from outdoor unit.
Improper setting of indoor unit or
remote controller.
During auto. address setting,
number of connected units does
not correspond to number set.
When turning on the power
supply, number of connected
units does not correspond to
number set.
(Except R.C. address is "0.")
Indoor unit communication error
of group control wiring.
This outdoor unit cannot collect more than the rated refrigerant amount as shown

by the nameplate on the back.
If the amount of refrigerant is more than that recommended, do not conduct pump

down. In this case use another refrigerant collecting system.
LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.
M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm
N = Alarm No.
Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.
Alarm is "P17."
Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)
Ex: Auto address is not completed.
Error in transmitting serial communication signal.
Error in receiving serial communication signal.
When turning on the power supply, the number of connected
indoor units does not correspond to the number set. (Except R.C.
address is "0.")
Error of the outdoor unit in receiving serial communication signal
from the indoor unit.
Indoor unit address setting is duplicated.
Remote controller address connector (RCU. ADR) is duplicated.
(Duplication of main remote controller)
Starting auto. address setting is prohibited.
This alarm message shows that the auto address connector CN100
is shorted while other RC line is executing auto address operation.
Error in auto. address setting. (Number of connected indoor units
is less than the number set)
Error in auto. address setting. (Number of connected indoor units
is more than the number set)
No indoor unit is connected during auto. address setting.
Error of outdoor unit address setting.
Error of main indoor unit in receiving serial communication signal
from sub indoor units.
Alarm contents
4- 16
Test Run and Others
Alarm
message
<E01>
<E02>
<<E03>>
E04
<E06>
E08
<<E09>>
E12
E15
E16
E20
E25
E18
Continued