88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第21页

21 Issue 06 , December 2020 SHUTDOWN – If on completion of the DISCONNECT period no Temperature Sign a l is presen t , the TCM will cease operation and enter a SHUTDOWN peri o d. The SHUTDOWN period is ad j ustable betwe…

20 Issue 06, December 2020

Disconnect and Shutdown Periods

WARNING

ELECTRICAL HAZARD. Ensure Isolator is in the OFF

position before opening access door.

The Control PCB is fitted with two rotary switches (FIG 23).

FIG 23

DISCONNECT – This defines the period between the Temperature Signal to the TCM

being removed or disconnected and the TCM entering a SHUTDOWN period. The

DISCONNECT period is adjustable between 0 – 9 minutes in 1 minute increments. The

default setting is 1 minute. The Amber beacon will flash rapidly during the

DISCONNECT period. If the Temperature Signal to the TCM is reinstated during the

Disconnect period, the TCM will continue to run and not enter a SHUTDOWN period.

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