WaterFurnace TruClimate 700, Installation Manual

29

TRUCLIMATE 700 90-140 TON INSTALLATION MANUAL 

HydroLink2 Aurora Chiller Controls cont.

Field Selectable Options via Hardware 

DIP Switch (SW1) – Test/Configuration Button (See SW1 
Operation Table) 

Test Mode 

The control is placed in the test mode by holding the push 
button switch SW1 for 2 - 5 seconds. In test mode most of 
the control timings will be shortened by a factor of sixteen 
(16). LED3 (green) will flash at 1 second on and 1 second off. 
Additionally, when entering test mode LED1 (red) will flash 
the last lockout one time. Test mode will automatically time 
out after 30 minutes. Test mode can be exited by press-
ing and holding the SW1 button for 2 to 5 seconds or by 
cycling the power. NOTE: Test mode will automatically be 
exited after 30 minutes. 

Reset Configuration Mode 

The control is placed in reset configuration mode by holding 
the push button switch SW1 for 50 to 60 seconds. This will 
reset all configuration settings and the EEPROM back to 
the factory default settings. LED3 (green) will turn off when 
entering reset configuration mode. Once LED3 (green) turns 
off, release SW1 and the control will reset. 

DIP Switch (SW2) 

SW2-1 FP1 Selection – Low water coil temperature limit setting 
for freeze detection. On = 30°F [-1.1 °C]; Off = 15°F [-9.4°C]. 
On is default.
SW2-2 FP2 Selection – On = 30°F [-1.1 °C]; Off = N/A. On is 
default.
SW2-3 RV – O/B - Reversing Valve Position. Normally cooling 
"B" or normally heating "O" On = O; Off = B. B is default.
SW2-4 and 2-5 Access Relay Operation (P2).  On and On is 
default.
SW2-6 CC Operation – selection of single or dual capacity 
compressor.  On = Single Stage; Off = Dual Capacity.  On is 
default.

SW2-7 Lockout and Alarm Outputs (P2) – selection of a 
continuous or pulsed output for both the LO and ALM 
Outputs. On = Continuous; Off = Pulsed.  On is default.
SW2-8 Future Use.  On is default.

Alarm Jumper Clip Selection

From the factory, ALM is connected to 24 VAC via JW2. By 
cutting JW2, ALM becomes a dry contact connected to ALG. 

Access Relay Operation

SW2-4

SW2-5

Cycles with Blower

ON

ON

Cycle with Compressor

OFF

OFF

Water Valve Slow Opening

ON

OFF

(Reserved)

OFF

ON

Software Features

Safety Features

The following safety features are provided to protect the 
compressor, heat exchangers, wiring and other components 
from damage caused by operation outside of design 
conditions. 

Fuse –

 a 3 amp automotive type plug-in fuse and each ABC 

provides protection against a low Voltage short circuit or 
overload conditions. 

Anti-Short Cycle Protection –

 5 minute anti-short cycle 

protection for the compressor. 

Compressor Minimum On Time - 

5 minute minimum on-time 

protection for the compressor to insure oil circulation for each 
compressor cycle.

Random Start – 

5 to 80 second random start upon power up 

and return from load shed or emergency shutdown. 

Fault Retry –

 in the fault condition, the control will stage off 

the outputs and then “try again” to satisfy the Y input call. 
Once the thermostat input calls are satisfied, the control will 
continue on as if no fault occurred. If 3 consecutive faults 
occur without satisfying the thermostat Y input call, then the 
control will go to lockout mode. 

Lockout – 

when locked out, the Alarm output (ALM) 

and Lockout output (L) will be turned on. The fault type 
identification display LED1 (Red) shall flash the fault code.  
Lockout may also be reset by turning power off for at least 30 
seconds or through HMI or BACnet.
 

High Pressure – 

The E2 fault is recognized when the Normally 

Closed High Pressure Switch, P4-9/10 opens, no matter how 
momentarily. The High Pressure Switch is electrically in series 
with the Compressor Contactor and serves as a hardwired 
limit switch if an overpressure condition should occur.

Low Pressure -

 The E3 fault is recognized when the Normally 

Closed Low Pressure Switch, P4-7/8 is continuously open for 
30 seconds. Closure of the LPS any time during the 30 second 
recognition time restarts the 30 second continuous open 
requirement. 

Loss of Charge -

 the E6 fault is recognized when the Normally 

Closed Low Pressure Switch, P4-7/8 is open prior to the 
compressor starting.