Installation manual

ATC32U01A Communicating, Programmable Thermostat - IOM
Created: 1 Oct., 2012
14
9.5 CLEAR FAULT HISTORY
Clear Fault History will clear all fault codes stored in the
thermostat as well as the fault history in any connected
communicating controls (DXM2/AXM).
9.6 MULT-UNIT DIAGNOSTICS
If multiple units are connected to one thermostat when
Manual Operation, Control Diagnostics, or Dipstick
Confi guration is selected, the service personnel will see a
screen to select a specifi c unit by the last 4 digits of its serial
number.
NOTE: Multiple units may be connected directly to the ATC
thermostat or connected to one another in series, as shown by
the fi gure below.
9.4.5 Possible Causes
Possible causes as to why the fault occurred
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
POSSIBLE FAULT CAUSES
LOW WATER COIL TEMP
LOW WATER TEMP - HTG
LOW WATER FLOW - HTG
LOW REFRIG CHARGE - HTG
INCORRECT LT1 SETTING
BAD LT1 THERMISTOR
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Two
connections
on DXM2
board to allow
for multi-unit
installation
Or
9.4.2 Flow Conditions
Displays detailed blower and pump speed / valve
position readings that were recorded at the time the
fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
9.4.3 Input/Output Conditions
Displays the status of all physical and communicated
inputs, switches, and control outputs that were
recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
9.4.4 Confi guration Conditions
Displays the status of all dipswitch settings that were
recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
FAULT FLOW CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
ECM TARGET CFM 800
ECM BLOWER RPM 550
FLOW RATE GPM 6.5
PUMP SPEED 60%
VALVE POSITION 0%
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FAULT I / O CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
TSTAT SAFETY OUTPT
CONV COMM HPS
Y1 Y1 LOC CC
Y2 Y2 CO RV
WW ACC1
O O OUTPT ACC2
G GFAN AL1
HH HWG EH1
OVR DH PUMP EH2
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FAULT CONFG CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
S1 S2 S3
1 ON 1 ON 1 ON
2 ON 2 ON 2 OFF
3 ON 3 ON 3 OFF
4 ON 4 ON 4 OFF
5 ON 5 ON
6 ON 6 ON LT1 WELL
7 ON 7 ON LT2 WELL
8 ON 8 ON
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