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PVI Industries PV500-45U User Manual

Page 25

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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