Thermo Technologies SMT 100 User Manual

Page 15

SECTION 4 - FAULT FINDING

Problem:

Nothing happens when the unit is powered-up.

Cause / Remedy:

One of the fuses could be blown - check and replace if
necessary (refer to specifications for values). If the fuse blows
again, contact the agent where the unit was purchased.

Problem:

The temperature display is fluctuating.

Cause / Remedy:

One of the sensor connections may be loose. Tighten
connections and re-route cables if necessary.

Problem:

Unable to set any of the parameters: Keypad will not operate.

Cause / Remedy:

The keypad Lock is on - see ‘Keypad Lock’ section 3.5.2.

Problem:

One of the sensors is reading “F”.

Cause / Remedy:

One of the sensors is either faulty or not properly connected or
is reading a temperature above 100°C. The sensor, which is
causing the problem, will show “F” on the display when
selected. Check that all connections / couplers are secure. If
the fault persists, replace the sensor.

Problem:

The “T” light is flashing even when the keypad lock is engaged.

Cause/Remedy:

This is not a fault. This is an indication that the temperature of
the collector is below the anti-frost set point (-15°C), and the
pump should be on.