88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第22页
22 Issue 06 , December 2020 PV = SV +/- 1°C PV ≠ SV +/- 1°C Filter OK Change Filter FIG 25
21 Issue 06, December 2020
SHUTDOWN – If on completion of the DISCONNECT period no Temperature Signal is
present, the TCM will cease operation and enter a SHUTDOWN period. The
SHUTDOWN period is adjustable between 0 – 9 minutes in 1 minute increments. The
default setting is 1 minute. The Amber beacon will flash slowly during the SHUTDOWN
period. If the Temperature Signal is reinstated during this period, the TCM will not
commence operation until the SHUTDOWN period is complete. The Amber beacon will
illuminate continuously on completion of the SHUTDOWN period with no Temperature
Signal present.
FIG 24
Preventative Maintenance
Checking the Discharge Filter
WARNING
ELECTRICAL HAZARD. Ensure Isolator is in the OFF
position before opening access door.
WARNING
BEWARE OF MOVING PARTS. Allow time for fan rotation to
cease before opening access door.
The life span of the TCM Discharge Filter (part number 181944); will vary depending on
the level of contamination of the ambient air. The filter can be deemed serviceable if the
TCM can maintain the process temperature (PV) within +/- 1°C of Target temperature
(SV) (FIG 25).
22 Issue 06, December 2020
PV = SV +/- 1°C
PV ≠ SV +/- 1°C
Filter OK
Change Filter
FIG 25
23 Issue 06, December 2020
Condenser Fan/Coil
WARNING
BEWARE OF MOVING PARTS. Allow time for fan rotation to
cease before opening access door.
WARNING
ELECTRICAL HAZARD. Ensure Isolator is in the OFF
position before opening access door.
The condenser fan intake grilles should be visually checked on a regular basis to ensure
they are free from obstruction with no impedance to air flow.
In order to access the Condensing unit, the cover must be removed using the 4x Hex
Socket screws. (Fig 26).
FIG 26
Check that the Condenser Core and fan grille are free from obstruction.
FIG 27
If it is thought likely the underside of the condenser coil may be obstructed, air applied
as shown below may help improve TCM operating performance (FIG 27).