88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第37页

Fault Indication – Heater Circuit Breaker Open (Automatic Shutdown) YES NO Isolate mai ns s upply from TCM, reset 10A Heater MCB a n d power up TCM. Is the Heater fun ct ioning correctly now? Is fault indica ti on still …

Warning Indication - Condensate Container

Over Full (Automatic Shutdown)

YES

Has the Condensate Container been

emptied?

Remove connector CN8 from control PCB.

Has the fault Cleared?

Empty Condensate

Container

Replace Control PCB

Part No. 181984

YES

Replace Level

Sensor

Part No. 181995

Use TCM CCT DWG 181948 as reference for further

fault finding.

Fault Indication – Heater Circuit Breaker Open

(Automatic Shutdown)

YES

Isolate mains supply from TCM, reset 10A

Heater MCB and power up TCM. Is the

Heater functioning correctly now?

Is fault indication still present?

Replace Heater

Modules(s)

Part No. 173772

YES

Use TCM CCT DWG 181948 as reference for

further fault finding.

Check following components for failure:

Control PCB Part No.181984

10A MCB Part No. 181986

Contactor Part No. 181989.

No Beacon Lamps Illuminated

YES

Is the green indicator lamp next to the isolator illuminated

when the isolator is turned on?

Is the 1A MCB in the ON position?

Restore mains

supply to TCM.

230V +/- 10% (207V

to 253V working

range) 50/60Hz

(If MCB is a ‘C’ Type then fit replacement ‘D’

Type Part No 202405).

Reset MCB does it stay ON?

YES

Is 24V DC present on PSU output

terminals?

Disconnect CN4 from Control PCB.

Reset MCB.

Does it stay ON?

YES

Replace PSU Part No. 181987

Reconnect CN4.

Check beacon lamps, replacement

Part No. 178761.

Or replace Beacon Part No. 178762

YES

Is there 24V DC across Pin 1 and Pins

2-6 on control PCB CN2?