Vmac RAPTAIR-G30, Руководство по обслуживанию

Страница: 73 / 96

VMAC
– Vehicle Mounted Air Compressors
Toll Free: 1-888-241-2289
Fax: 1-250-740-3201
71
Over-Temperature Relay
There is only one relay on the Gas Drive located next to the battery, this is
used for the over temperature protection circuit. The temperature switch
on the VMAC gas drive is normally closed and becomes an open circuit at
140 °C (290 °F).
When the over-temperature switch opens, it de-energizes the over-temp
relay coil and grounds the engine ignition circuit, disabling the engine from
running or starting, the engine starter will still function.
Relay Pin Connections

30
– Ground

87A - Ignition (will be an open circuit with the key switch in the run
position, and will be grounded with key switch in off position)

86 - Key Switched 12V

85 - Temperature Switch (normally closed)
Relay Testing
1) Remove the relay from the holder.
2) Use a multimeter to measure the resistance across pin 30 and 87A,
this should measure 0
Ω.
3) Apply +12 V to pin 86 and a ground to pin 85, the solenoid should
audibly click.
4) Keep +12 V applied to pin 86 and a ground to pin 85. Use a
multimeter to measure resistance across pin 30 and pin 87 on the
relay. This should measure 0
Ω.
Figure 57 - Temperature relay location and diagram