Ambirad AIRBLOC ACR Series, Instruction Manual, Page: 34 / 44

34
Code Description Symptom Possible Cause Remedy
a 1
COMMUNICATION FAILURE.
Code ‘a 1’ is displayed when the
Program panel looses communi-
cation with the base unit.
No control
- Terminals wired incorrectly - Check wiring diagram section 5
- Incorrect Polarity - Swap cables to terminals ‘0V’ & ‘7V’
- Damaged cable - Replace with suitable wiring
a 2
AIR SENSOR TOO HOT.
Code ‘a 2’ is displayed when the
air sensor detects an ambient
temperature above 60°C
High Ambient Air
Lack of air flow
through & into
unit.
- Impellor turning in opposite
direction.
- Check rotation of impellor.
- Motor failure. - Check Motor & replace if necessary.
a 4
AIR SENSOR FAILURE.
Code ‘a 4’ is displayed when the
air sensor is open circuit
Fan operating.
No heat.
- Air sensor wiring disconnected - Check wires.
- Air sensor Broken - Replace Air Sensor.
a 8
HEATSINK TOO HOT
Code ‘a 8’ is displayed when the
sensor on the heatsink detects a
temperature above 65°C
- High Ambient air/damaged
Heatsink
- Replace SmartElec Base unit.
- Damaged Cooling Fan - Replace cooling fan
a 16
HEATSINK SENSOR FAILURE.
Code ‘a 16’ is displayed when the
heatsink is open circuit
- Heatsink wiring disconnected - Check wires.
- Heatsink Broken - Replace SmartElec Base unit.
10.4.2 SmartElec base unit LED indicator location/function:
No heat
fan on or off
Heat on
fan on
Up to
temperature
= OFF
= ON
= PULSING
Key
10.4.1 SmartElec fault codes
1: Polarity: Use a multimeter to check correct
polarity between all 4 cores i.e. that 0v goes to 0v,
7v goes to 7v, A to A, and B to B.
2: Continuity: Use a multimeter to check continuity
between each end of all four cores.
3: Short circuit: Use a multimeter to check that
there are no short circuits between any of the four
cores.
N.B. This test should be done with both ends of
the cable disconnected to avoid false readings.
4:
Plugs:
a) Check that the correct length of insula-
tion has been stripped from each core.
b) Check the tightness of the cables in the
plugs.
c) Check that the plugs are fitted to the
correct circuit board pins.
d) Check that the plugs are firmly seated on
the circuit board pins in both the program panel
and on the base unit.
e) Check for continuity between the plug
terminal screw and the pcb pin with the plug in
place, (accessible through plug moulding).
5:
Addressing: (Network versions only). If two or
more air curtains are networked, check that each
base unit has a unique address as described in
section 12.3