PVI Industries PV500-45U User Manual
Page 25
25
PV500-45U 06/12
11.8 LED Display Alarm Messages
Alarm messages are displayed in the upper LED readout and alternate with the default display. An alarm LED ICON
is also illuminated. (See TempTrac User Manual PV500-40 for full description.)
12
REMOTE CONNECTIONS – TERMINAL STRIP
12.1 Making BMS/BAS remote connections for analog and binary (on/off) signals
A terminal strip for the remote connection is located behind the hinged control panel at the top of the cabinet and is
accessed by removing the bottom cover and then removing the screws at the top of the hinged cover.
Important:
Do not use single strand bell wire for remote field connections to terminals R1-R2 and C1-C2. Use only
multi-strand copper wire. See table below for wire length and gauge:
WARNING: Turn off all electrical service to the appliance when accessing the remote connections located
inside the control cabinet. These terminals are High Voltage. If the electrical service is not turned off and
these terminals are touched, a dangerous shock causing personal injury or loss of life could occur. Close
and fasten the control cabinet cover before restoring electrical service to the appliance.
ALARM
MESSAGE
CAUSE
RESULTS OF ALARM CONDITION
RECOMMENDED
ACTION
“P1”
TP1 probe failure
Inlet temperature sensor is not
connected or is reading incorrectly. Call
for heat and burner modulation output
signal will revert to low fire.
Check wiring and sensor
Terminals 14 & 17
“P2”
TP2 probe failure
Temperature sensor is not connected
or is reading incorrectly.
Check wiring and sensor
Terminals 15 & 17
“P3”
TP3 probe failure
Temperature sensor is not connected
or is reading incorrectly or flue gas
temperature protection is disabled (if
used).
Check wiring and sensor
Terminals 16 & 17
“HA”
High temperature limit
setpoint exceeded
Buzzer sounds, operation continues
Manual reset required
“LA”
Low temperature alarm
Buzzer sounds, operation continues
HP
Digital input 3 is activated
for one or more of the
following:
Flame failure or any control
component failure, if
equipped with alarm on any
failure option
Unit de-energized after timer delay
Manually reset required
LP
Digital input 2 is activated
Unit de-energized after timer delay
Manually reset required
Mn1
Maintenance alarm for
output 1
Buzzer sounds, operation continues
Check wiring and sensor
Mn2
Maintenance alarm for
output 2
Buzzer sounds, operation continues
Check wiring and sensor
Mn3
Maintenance alarm for
output 3
Buzzer sounds, operation continues
Check wiring and sensor
“rtc”
The real time clock has lost
its setting
Energy saving function disabled
Reprogram clock
Wire Gauge
18 GA
16GA
14 GA
12 GA
Maximum Length
30 FT
50 FT
75 FT
100 FT