A
The unit does not come on.
• Power cable fuse blown.
• Electronic control power fuse blown.
• Power cable disconnected, cut or
inverted.
• Control panel internal switch position
incorrect (operation with engine switched
off, switch in trucks only).
• Power cable inverted.
• Power cable not connected.
• Replace the power cable 50A fuse, checking and correcting the cause of the failure.
• Replace the 15A (24V) or 25A (12V) fuse of the electronic control power cable (accessed by
taking down the control panel).
• Check connections or possible breakage, correcting or replacing.
• Check the position of the switch. Place in “O” trucks only (operation with engine switched off)
(Accessed by taking down the control panel).
• Check and repair the connections.
• Check and repair the connections.
B
The unit gives out a beeping sound.
• Control panel and electronic control
connection cable poorly connected or
inverted.
• Take down the control panel and connect the wiring between the control panel and the electronic
control.
C
The display shows the symbol Lb.
• Battery running low.
• Poor contact in connections (power
supply terminals or battery).
• Charge or replace the battery.
• Check and correct any possible poor contacts.
D
The unit does not respond to the remo-
te control.
• Remote control not programmed.
• Remote control battery at; the LED does
not come on.
• Electronic control faulty.
• Remote control defective.
• Reprogramme the remote control.
• Replace the remote control’s battery and reprogramme.
• Replace the electronic control (accessed by taking down the control panel).
• Replace the remote control.
E
The display shows E0 without ashing.
• Poor return air sensor terminal or cable
contact.
• Return air sensor faulty.
• Check the cable or terminal contacts.
• Replace the return air sensor.
F
The display shows E6 without ashing.
• Poor anti-freeze sensor terminal or cable
contact.
• Anti-freeze sensor faulty.
• Check the cable or terminal contacts.
• Replace the anti-freeze sensor (the sensor is perforated in the evaporator).