Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
156
# Name Description
161 DEF TERM TMP
(Only HVAC)
If both coil #1 and coil #2 temperature are greater than the value of this Setpoint, then the
defrost cycle can be terminated.
B-PUMP FLT
(Boiler/Pump Control)
The ‘Value’ is not used as this set point is set up to check the status of a digital input indicated
in the Starting Pump Fault cell.
‘Time(sec)’ field: contains the delay before the system will place a pump in a failed state.
162 DEF TERM DEL
(Only HVAC)
The length of time in minutes of the defrost cycle.
163 HP HEAT TARG
(Only HVAC)
If active, then this value will become the target temperature during heating mode.
Purge Target
(Only CENT)
If active, it indicates that a Trane external purge system is incorporated. When the suction
temperature is less than this value for the number of seconds in the ‘Safety Down Time’,
then the purging sequence will begin.
B-HEAT TRGT
(Boiler/Pump Control)
The heating target that is to be maintained.
164 HP CTL ZONE +
(Only HVAC)
Added to Setpoint #163 “HP HEAT TARG” to create the upper limit of the control zone during
heating mode.
Purge Fault
(Only CENT)
If active and a purge safety switch is used, this Setpoint will contain the number of seconds
the switch must be ON before a purge error alarm occurs.
B-HEAT ZONE+
(Boiler/Pump Control)
The high dead band for the heating control zone. This value is added to the value of set point
#163.
165 HP CTL ZONE –
(Only HVAC)
Subtracted from Setpoint #163 “HP HEAT TARG” to create the lower limit of the control zone
during heating mode.
Purge ExTime
(Only CENT)
If the time in purging mode for the last 24 hours is greater than the value of this Setpoint, an
excessive purging alarm will be generated.
B-HEAT ZONE-
(Boiler/Pump Control)
The low dead band for the heating control zone. This value is subtracted form the value of set
point #163.
166 PHASE LOSS If active and the phase loss digital input is ON for the specified period of time, a safety trip
occurs. The system will attempt to restart after waiting the number of minutes contained
in the ‘Safety Down Time’ field of this Setpoint.
167 PURGE FLT ERROR If active and purge float error occurs, a purge float alarm is generated. This Fault requires a
lockout reset to resume purge operation.
168 PURGE COUNT If the total number of purges that occurred during the last three purge cycles exceed this
value, then reset all counters and generate a Maximum Purges Exceeded alarm. For the
first thirty minutes of compressor run time – this alarm is by passed.
169 PURGE PSI ST When the purge pressure sensor reading is equal or greater than this value, then a purge
cycle will be initiated. The cycle will end when the purge pressure sensor reading is less
than the value of this Setpoint minus Setpoint #193 “PSI DIFF”, or 5 psi if inactive.
170 EXCESS PURGE If the time in a purge cycle exceeds this Setpoint’s value in seconds, then the cycle will be
terminated and an Excessive Purge Time alarm will be generated. This fault requires a
lockout reset to resume purge operation.
171 FLA COMP#1 Full Load Amps for compressor #1. This is the amps at design suction and discharge
pressures referenced in the MCS-Config RO screen. This value is used to calculate the
high and the low amperage safety limits. Refer to Setpoints #75 and #76.
For screw compressors: The amp draw when the compressor is fully loaded. This value is
used to calculate the Full Load Amps Percentage (FLA %), which is used to control
loading and unloading the slide valve.
172 FLA COMP#2 Full Load Amps for compressor #2. Refer to Setpoint #171.
173 FLA COMP#3 Full Load Amps for compressor #3. Refer to Setpoint #171.
174 FLA COMP#4 Full Load Amps for compressor #4. Refer to Setpoint #171.
175 FLA COMP#5 Full Load Amps for compressor #5. Refer to Setpoint #171.
176 FLA COMP#6 Full Load Amps for compressor #6. Refer to Setpoint #171.
177 FLA COMP#7 Full Load Amps for compressor #7. Refer to Setpoint #171.
178 FLA COMP#8 Full Load Amps for compressor #8. Refer to Setpoint #171.
179 FLA COMP#9 Full Load Amps for compressor #9. Refer to Setpoint #171.