PRIMO TECHNICAL MANUAL
Page
11
7
Junction box / sensor diagnosis
Built into the software of the Intea junction box there is a diagnostic mode. This mode
can detect if there is a sensor fault or internal component fault in the junction box.
With setting
3 on the junction box
, the test procedure is as follows.
A)
Sensor
If the sensor is faulty the JB will supply power to the heater in the following
sequence: 60 seconds ON / 12 seconds OFF
B) Junction
Box
If there is a failure of component within the JB the power supply to the heater is
in the following sequence: 80 seconds ON / 16 seconds OFF
Test method
The above tests require that power is applied to the JB. The suggested procedure is
as follows:
1.
Remove the power cable from the JB
2.
De-mount the JB from the rear of the Minibar
3.
Disconnect the wires to the heater/resistance
4.
Connect a test lamp 60W bulb and lead with Faston connectors to the heater
terminals on the JB. Check bulb voltage corresponds to JB voltage. Re-fix the
JB to the Minibar.
5.
Connect the power lead
6.
Turn on power and check the lamp function to identify a condition as per A) or
B) above.
7.
If a volt meter is available, the voltage across the terminals of the lamp can also
be measured to check function. To facilitate this a block connector should be
installed in the cable between the lamp holder and the Faston connectors.
