88181945-01-06 Technical Reference Manual ( Production Iss 06 December 2020).pdf - 第30页
30 Issue 06 , December 2020 Display and Condensate Error Chec klist ERROR REMEDY PV displa y ed as flashing UUUU Printer turne d off or not initialized . Temperatu re Se nsor Loom between Printer and TCM disconnected . C…
29 Issue 06, December 2020
7. Air Conditioning Unit Circuit Breaker Open (Automatic Shutdown)
CN6 CN9 CN10CN7
CN8
CN11
CN1 CN2
CN3
CN4
RL1 RL2 RL3 RL4
RL5
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED10
SW1
SW2
8. Heater Circuit Breaker Open (Automatic Shutdown)
CN6 CN9 CN10CN7
CN8
CN11
CN1 CN2
CN3
CN4
RL1 RL2 RL3 RL4
RL5
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED10
SW1
SW2
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