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Installation and operation manual
–
DTHR-V9-2020
Flame safeguards warning lights status:
The table below lists the most common and important operational fault codes in the flame safeguard
relay. (Refer to flame safeguard instructions manual for other codes not listed in this table)
Trouble
code
Trouble description
(alarms)
Red Lights
OPR
CTRL
Air
flow
PTFI Flame Alarm
6
Frequency noise
•
O
O
•
*
7
Pilot flame failure (PTFI)
O
•
•
•
*
19
Burner flame failure (MTFI)
O
O
•
•
*
21
Lockout Interlock open
•
•
•
O
*
54
Ground fault
O
O
O
•
*
55
Faulty programmer
O
O
•
O
*
56
Faulty amplifier
•
O
O
O
*
Lights:
•
= ON
O = OFF
* = Flashing
IMPORTANT
A manual reset is needed on the flame safeguard before resetting the alarm on
the touch screen panel of the PLC and be able to restart the burner
Flame safeguard alarms
