8. Alarms and Troubleshooting Guide
8-117
C. HARDWARE ALARMS
:
ALARM MESSAGE
POSSIBLE CAUSE
SYSTEM RESPONSE
OPERATOR ACTION
AIR DETECTOR
FAULT
“AIR DETECTOR FAULT.
TURN OFF POWER,
SERVICE MACHINE.”
Air detector failure, did not
pass hardware test when
the system first powers
up.
Sound alarm and
display ‘Air Detector
Fault’ message and
halt all operations.
Power down and service machine: replace the air detector electronics.
HEATER FAULT
LATCH
“HEATER FAULT LATCH
AT LOCATION A B C D.
PRESS RETRY TO
CONTINUE. SERVICE
MACHINE IF ERROR
PERSISTS.”
Excessive AC power line
noise or internal failure
Stop pumping and
heating. Sound alarm
and display message.
Valve in the
recirculate position.
Press RETRY to try again.
Power down and service machine if error persists: replace Power Driver
Module.
HEATER POWER
READ BACK FAULT
“HEATER POWER I/O
FAULT. RESTART
SYSTEM AND RETRY.
SERVICE MACHINE IF
ERROR PERSISTS.”
Heater power feedback
sense coil open.
Power feedback circuit
malfunction.
Stop pumping and
heating. Sound alarm
and display message.
Valve in the
recirculate position.
Restart the system, and try again.
Power down and service machine if error persists:
•
Remove and clean input and output temperature probes
•
Replace Power Driver Module
HEATER OVER
POWER FAULT
“HEATER OVER POWER
FAULT. PRESS RETRY
TO CONTINUE. SERVICE
MACHINE IF ERROR
PERSISTS.”
Heater hardware fault
Stop pumping and
heating. Sound alarm
and display message.
Valve in the
recirculate position.
System will try to
reset the error.
Push RETRY to try again.
Power down and service machine if error persists:
•
Remove and clean input and output temperature probes
•
Replace Power Driver Module