88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第31页
31 Issue 06 , December 2020 Electrica l Faults Error Remedy Red Bea c on (No Blue) (TCM Shutdown ) Check ACU circuit breaker is closed. Check heater circu it breaker is closed Heater Enclosu re T hermal Trip may have op …
30 Issue 06, December 2020
Display and Condensate Error Checklist
ERROR
REMEDY
PV displayed as flashing UUUU
Printer turned off or not initialized.
Temperature Sensor Loom between Printer and
TCM disconnected. Check connections.
SV not reached within 40
minutes.
PV not maintained within +/- 1°C
of SV.
Check that the Printer side safety covers are fitted.
Check/replace TCM discharge filter.
Check Air In and Air Return ducting is correctly
fitted.
Check all Printer covers are fitted and closed.
Check Controller PV is not displayed as UUUU (see
above).
Check SV is set to a value within +/- 8°C of ambient
temperature.
Check ACU condenser grills are not blocked or
obstructed.
No beacon and/or Controller display (see electrical
faults section).
TCM fails to move PV towards SV. Possible fault
with ACU, Heater, or Control Module. ESCALATE
Check supply voltage has not dropped below 207V
ErEP displayed on Controller
Possible anomaly of the Controllers EPROM
memory. Press the P key.
Blue and Red Beacon
(TCM Shutdown)
Condensate Container Full and approaching
Overflow condition. Empty Condensate Container.
Condensate on Lower Tray. Drain condensate from
tray and ensure Condensate Container is in place,
drip tray plug is removed, and container is not
leaking.
31 Issue 06, December 2020
Electrical Faults
Error
Remedy
Red Beacon (No Blue)
(TCM Shutdown)
Check ACU circuit breaker is closed.
Check heater circuit breaker is closed
Heater Enclosure Thermal Trip may have operated
due to an over temperature condition.
Investigate cause of failure. ESCALATE
No display on Beacon or
Controller
Check Control Module circuit breaker is closed.
WARNING
ELECTRICAL HAZARD. Ensure Isolator is in the OFF
position before opening access door. The following
procedures should only be carried out by suitable
personnel.
I-ON I-ON I-ON I-ON I-ON
C1 C10 C6
FIG 28
Circuit Breakers (located on the Control Module) protect components and wiring in the
24Vdc Control (C1), Heater (C10), and Air Conditioner Unit (C6) circuits from excessive
currents. Should a circuit breaker open, the cause must be investigated before closing
and re-energizing the circuit. ESCALATE if fault persists and Circuit Breaker will not
remain closed.
Diagnostic Flow Charts
Flow charts on following pages
Fault Indication - ACU MCB Has
Tripped
YES
NO
O
Check mains supply voltage is within
operating range of 207 – 253V.
Isolate mains supply from TCM, reset 6A
ACU MCB and power up TCM.
Is the ACU functioning correctly now?
Is fault indication still present?
Replace ACU
Part No. 202340
See install procedure
YES
Use TCM CCT DWG 181948 as reference for further
fault finding.
Check following components for failure:
Control PCB Part No. 181984
6A MCB Part No. 181985
Contactor Part No. 181989.
Use TCM CCT DWG 181948 as reference for further fault
finding.