Maintenance & Repair
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NOTE
Due to environmental factors, the useful life of all ‘Extended Life’ lubricants may be shorter
than quoted by the lubricant supplier. IMT encourages the user to closely monitor the
lubricant condition and to participate in an oil analysis program with the supplier.
No lubricant, however good and/or expensive, can replace proper maintenance and attention.
Select and use lubricant wisely.
Relay Module
The IMT CAS3560 compressor includes a relay module which is very useful in troubleshooting.
Each relay on the module has an LED which indicates the status of the relay. A decal next to
the relay indicates which lights control which functions.
ENABLE
HI-TEMP
HYD SOL
FAN
POWER
Enable - Control relay which enables other relays
Fan - Relay for electric fan
Hyd Sol - Hydraulic solenoid relay which is fed by power
relay, controls hi-temp relay
Hi-Temp - High temperature relay, controls hydraulic
solenoid relay
Power - Main power to solenoid
Normal Operation
When the compressor is turned on, the
Power
and
Enable
relays will light, indicating normal
operation. When the oil temperature reaches 180° F, the
Fan
relay turns on, indicating that the
fan is on. The fan will "latch" on and stay on until the compressor is shut down.
High Temperature Shut-Down
When a high temperature situation occurs, with a temperature above 250° F, the
Power
relay will
turn off and the
Hi-Temp
and
Hyd Sol
relays will light, indicating high temperatures. The lighted
switch on the user control panel will also light. The fan will stay on if it was already on.
To reset, push the lighted pushbutton switch on the control panel. This will reset all switches to
normal condition (
Enable
and
Power
relays will be on) and the compressor will restart. If there
is still a problem, the unit will shut down again once the temperature reaches 250° F.
NOTE: Even if the reset switch is pressed, the light will stay on and the unit will not restart until
the temperature has dropped. Once the
Power
relay lights, the unit is ready to be reset.