88226673-01-03 Technical Reference Manual - (Production Iss 03 November 2020).pdf - 第32页

NO YES YES NO Replace Contactor Part No. 181989 Replace Control PCB Part No. 181984 Has Con t actor Operated? Check Ex hau s t vent on underside of TM TCM This is t he vent closest to the front o f the printer. Is there …

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

Type Part No 202405).

Reset MCB does it stay ON?

Is the 1A MCB in the ON position?

Is the green indicator lamp next to the isolator illuminated

when the isolator is turned on?

Is 24V DC present on PSU output

terminals?

Reconnect CN4

No Beacon Lamps Illuminated

YES NO

YES

Is there 24V DC across Pin 1 and Pins

2-6 on control PCB CN2?

YES

LED 1

Run

LED 2

Probe

LED 3

N/A

LED 4

N/A

LED 5

ACU ON

LED 6

Heater ON

LED 7

System Tripped

LED 8

Cond. bottle needs emptying

LED 9

Cond. bottle is full

LED 10

Cond bottle overflow

Use TM TCM CCT DWG 226671 as reference for

further fault finding.

Replace Control PCB

Part No. 181984

Check beacon lamps.

Replacement Beacon Part No. 178762

Restore mains

supply to TM TCM.

230V +/- 10% (207V

to 253V working

range) 50/60Hz

Disconnect CN4 from Control PCB.

Is 24V DC present on PSU output

terminals?

YES NO

Disconnect CN4 from Control PCB.

Reset MCB.

Does it stay ON?

Replace PSU Part No. 181987

Reconnect CN4.

YES

Replace Contactor

Part No. 181989

Replace Control PCB

Part No. 181984

Has Contactor Operated?

Check Exhaust vent on

underside of TM TCM This

is the vent closest to the

front of the printer. Is there

a strong airflow?

Thermal Trip mounted inside the electrical compartment on

the adjacent bulkhead may have operated due to an over

temperature condition.

Is the bulkhead very hot to touch?

Turn off TCM to allow enclosure to cool and

thermal trip time to reset.

Turn TCM back on. Has fault cleared?

Warning Indication - Heater Enclosure Over

Temperature (Automatic Shutdown)

YES NO

YES

Check for Open Circuit

across Thermal Trip if

open circuit replace.

Is airflow obstructed by a blocked?

Evaporator Fan may have

failed. Replace ACU

module Part No. 202340

See install procedure

Rectify blockage or replace filter

Part No. 181944

Use TCM CCT DWG 226671 as reference for further fault

finding.

Use TM TCM CCT 226671

as a reference.

Check across contactor

coil A1 and A2. Is 24VDC

present?

YES

LED 1

Run

LED 2

Probe

LED 3

N/A

LED 4

N/A

LED 5

ACU ON

LED 6

Heater ON

LED 7

System Tripped

LED 8

Cond. bottle needs emptying

LED 9

Cond. bottle is full

LED 10

Cond bottle overflow

Rectify leak and empty Condensate

Container.

Ensure all moisture is removed from

around the probes. Rectify continuity

fault and reconnect CN10.

Fault indication cleared?

Are there any condensate leaks?

Check ACU condensate drain hose is not

blocked or kinked. Check condensate

container yellow drain cap is securely

fitted and its O ring seal is in place.

Replace Control PCB

Part No. 181984

Replace Flood Sensor Cap

Warning Indication - Overflow on Lower

Collection Tray (Auto Shutdown)

YES NO

Use TCM CCT DWG 226671 as reference for further

fault finding.

YES

Is there continuity between the two

Flood Sensor probes?

LED 1

Run

LED 2

Probe

LED 3

N/A

LED 4

N/A

LED 5

ACU ON

LED 6

Heater ON

LED 7

System Tripped

LED 8

Cond. bottle needs emptying

LED 9

Cond. bottle is full

LED 10

Cond bottle overflow

Check the second condensate

tray in the chiller (requires

removal of chiller cover), does

this solve the problem?

Remove the green connector from CN10.

Does this clear the fault indication?