88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第39页
Warning Indication - Heater Enclosure Over Temperature (Automatic Shutdown) YES NO Thermal Trip mounted on top of Hea ter Enclosure may hav e o perated due to an over tem p erature condition. Is the top of the heater e n…
No Beacon Lamps Illuminated
YES
NO
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
NO
NO
Is 24V DC present on PSU output
terminals?
NO
NO
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?
Replace Control PCB
Part No. 181984
YES
NO
Disconnect CN4 from Control PCB.
Is 24V DC present on PSU output
terminals?
NO
Reconnect CN4
YES
Use TCM CCT DWG 181948 as reference for further
fault finding.
Warning Indication - Heater Enclosure Over
Temperature (Automatic Shutdown)
YES
NO
Thermal Trip mounted on top of Heater
Enclosure may have operated due to an
over temperature condition.
Is the top of the heater enclosure 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?
Use TCM CCT 181948 as a
reference.
Check across contactor
coil A1 and A2. Is 24VDC
present?
Has Contactor Operated?
YES
Remove Air In
flexible duct. Is there
a strong airflow?
NO
Is airflow obstructed by a blocked filter
or a restriction in the flexible ducting to
and from the printer?
Rectify blockage or replace filter
Part No. 181944
Evaporator Fan may have
failed. Replace ACU
module Part No. 202340
See install procedure
NO
NO
Replace Contactor
Part No. 181989
Check for Open Circuit
across Thermal Trip if
open circuit replace.
YES
YES
Replace Control PCB
Part No. 181984
NO
NO
YES
YES
Use TCM CCT DWG 181948 as reference for further fault
finding.
Warning Indication - Overflow on Lower
Collection Tray (Auto Shutdown)
YES
NO
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.
Rectify leak and empty Condensate
Container and Flood Sensor cap.
Remove the green Connector from
CN10.
Does this clear the fault indication?
Is there continuity between the two
Flood Sensor probes?
YES
Ensure all moisture is removed from
around the probes and the rubber
insulating grommets are in place.
Rectify continuity fault and reconnect
CN10.
Fault indication cleared?
Replace Control PCB
Part No. 181984
Replace Flood Sensor Cap
YES
NO
NO
NO
Refit Flood Sensor Cap
YES
Use TCM CCT DWG 181948 as reference for further
fault finding.