Rapid Engineering UHAM 150 Installation, operation & service manual - page 44
Manual is about: UHA-Series
Tubular Unit Heaters
of
72
UHA S
TANDARD
U
NIT
H
EATER
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
36 of 59
Figure 16: LED Diagnostic Codes
LED INDICATION FAULT MODE
Slow Flash
Normal Operation - No call for heat.
Fast Flash
Normal Operation - Call for heat.
2 Flashes
Ignition Lockout - No flame detected.
3 Flashes
Airflow Fault - Pressure switch open or closed.
4 Flashes
Temperature Limit Switch Open
5 Flashes
Flame Sense Error - Gas valve not energized.
Steady On
Internal Control Failure