Zone
Zone
Pioneer Gold 1.10 & 2.05 Controller Technical Guide
SEQUENCE OF OPERATIONS
1-31
Lock-Out Alarms
The lock-out alarms will not automatically reset themselves once the
fault condition clears. For these alarms to clear, one of the following
conditions must be met:
1.) Controller is power cycled.
2.) Fault condition is corrected and the compressor call
is removed.
3.) BACnet “Unit Lockout Remote Reset” (point BV:46)
is set true.
Auxiliary Input Alarm
The Auxiliary Input Alarm will enable if the compressor has been
operational for the minimum on time and a dry contact has been made
between the “AUX” and “COM” quick disconnect terminals for 10
seconds. This alarm will disable the compressor but will allow the
supply fan to operate.
Condensate Overflow Alarm
The Condensate Pan Overflow Alarm will enable if the resistance
between the condensate overflow sensor(s) and 24VAC common is
less than 100kΩ for more than 30 seconds. This alarm will disable
both the compressor and the supply fan.
High Discharge Pressure Alarm
The High Discharge Pressure Alarm will enable if the high pressure
switch opens. This alarm will immediately disable the compressor but
will continue to allow the supply fan to operate. The High Discharge
Pressure Alarm will remain active for a minimum of 15 minutes. The
compressor will restart after 15 minutes if the high pressure switch
is closed. A second High Discharge Pressure alarm within 2 hours
will cause a soft lockout.
Leaving Water Temperature Alarm
The Leaving Water Temperature Alarm will trigger if the refrigera-
tion line temperature or the leaving water temperature drops below
the freeze protection temperature. The glycol percentage will be
configured through the Pioneer Gold interface, determining what
temperature will trigger the alarm and what temperature will release
the alarm. This alarm will disable the compressor but will allow
operation of the supply fan. Acceptable water temperature range
is -10-120°F. The alarm is released only if 10 minutes has expired
and both the refrigeration line temperature and the leaving water
temperature have risen 5° above the freeze protection temperature.
If the refrigeration line temperature or the leaving water temperature
drops below the freeze protection temperature again within 2 hours,
then the alarm will be active until the refrigeration line temperature
and the leaving water temperature have both risen 5° above the freeze
protection temperature and either the unit is power cycled, the Y call
is removed, or a reset is sent from the BMS (soft lockout).
Low Suction Pressure Alarm
The Low Suction Pressure Alarm will enable if the low pressure
switch opens for more than 10 seconds. This alarm will disable
if both of these conditions occur: 15 minutes has expired and the
low pressure switch has closed. The compressor will not start if the
switch is open. If the alarm is enabled again within 2 hours, there
will be a hard lockout and require a power cycle to reset. Removal
of the compressor call will not reset the alarm while in hard lock out.
There will be a delay of 30 seconds after the compressor starts before
the alarm will enable.
Lock-Out Alarms
