EN
25
7. TROUBLESHOOTING
q
Before proceeding to carry out any repairs, make sure
that the conditioner is not connected to the power
supply.
7.1. The conditioner display does not switch on
Check the following:
− The battery disconnector is not switched off.
− The fuse (where present) to protect the power line is undamaged.
− The fuse (2) (Fig. 3) in proximity to the compressor is undamaged.
− The fuse (3) (Fig. 3) on the control board in the top front part is
undamaged.
− The power cord is not broken.
− The battery is in perfect working order.
− The voltage on the connectors of the compressor electronic
unit is the same as that of the battery. If there is a voltage
drop over 0.6 V, check the following:
− The section of the power cord is suited to its length (see
the indications in the installation manual).
− Any joints along the power line have not become worn and that
they have been correctly tightened.
− There is no oxidation on the battery poles or in contact points.
7.2. The fan feeding air into the cab does not switch on
Check the following:
− the battery voltage is not lower than the safety threshold of 24 V DC.
This situation is signalled by the indicator light switching on (6) (Fig.
1).
− There are no error or ongoing alarm signals (see paragraph “4.5.
ALARM / ERROR Signal”).
7.3. Insufficient conditioner cooling
Check the following:
(1)
(2)
(3)
fig. 3
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