Install Instructions

ManualsBrandsPeco Controls ManualsHeating SuppliesProportional Control 3 Speed Fan 2H/2C On/Off Thermostat, 0-10 VDC

520 Default Display Icons 0- Time, Temp, SP (Default) Icons that will be displayed in the default state.

NOTE: Setpoint will not be displayed if T8168 System Mode is OFF.

1- Time, Temp

2- Time

3- Temp

4- None

5 - Set Point Only

530 Revision Displays Current Revision Information

540 Factory Default Reset 0- Disable (Default) When enable is selected he device will return to factory default settings.

1- Enable

600 Cooling System Output

Test

0- Disable (Default) Cool Operation is enabled and the associated output based on Service Menu 110. The

output is activated for 10 minutes. The ON/OFF or 0-10 VDC Fan output will automatically

turn on.

1- Stage 1 Cooling/Y1 (TWF)

2 – Stage 2 Cooling/Y2 (TWF)

610 Heating System Output

Test

0- Disable (Default) Heat Operation is enabled and the associated output based on Service Menu 110. The

output is activated for 10 minutes. The ON/OFF or 0-10 VDC Fan output will automatically

turn on.

1- Stage 1 Heating/W1 (TWF)

2 – Stage 2 Heating/W2 (TWF)

620 Fan System Output Test 0- Disable (Default) If enabled is selected it will activate Based On Service Menu 110. The output will be

enabled for 10 minutes. If a different menu is selected the output will be disabled. Wheth-

er the fan output is a triac or a 0-10VDC/4-20mA is determined by Service Menu 112

1- Enable G Fan Output/GD Low

2 – Enable Y2 Fan Output/GD Med Cool

3 - Enable G1 Fan Output/GD Hi Cool

4 – Enable GD Med Heat

5 – Enable GD High Heat

In case of difculty, try one of the following suggestions below.

Symptom Potential Cause(s) Solution

If display screen is blank • Thermostat is not being powered • Check to assure proper wiring of power to (24 VAC-1) and (24 VAC-2) .

• Check power to verify that there is 24 VAC available.

• Default Display is set to “4” (None) • Check Service Menu 520.

If keys do not allow manual entry • Keypad Lockout may be enabled • Access Service Menu 340. Within this menu, select option “0” to assure

there is no keypad lockout (so manual entry is enabled).

Service Menu does not display • PIN access is enabled

• Buttons were not pressed simultaneously

• Access requires the three digit code set by the installer.

• Wait for unit to return to default display and retry.

Err In Clock Dispay • Indicates a service fault input • Indicates service is required.

Door in Clock Display • Door or window is open • Close door and /or window to clear fault.

Fdd in Clock Display • Indicate an economizer or other system fault • Indicates service is required.

If no heating or cooling is running, but there is a call

for heat or cool (Heat/Cool appears on display) in

Auto mode

• Heating or cooling equipment is not operating

• Minimum off time has not been met

• Check Service Menu 110 to assure that the correct option is selected to

match the system type.

• Check wiring, using output tests to verify (see Service Menus 600, 610,

620).

If heating or cooling system doesn’t respond • System type selection is incorrect • Check Service Menus 110 and 120 to assure that the correct option is

selected to match the system type.

If heating and cooling equipment are running at the

same time

• System type selection is incorrect • Check Service Menu 110 to assure that the correct option to match the

system type is selected.

• Verify wiring connections • Separate the heating and cooling wires, using output tests to verify (see

Service Menus 600, 610, 620).

If Demand Indicator light is red • Heating is occurring • No action is required.

If Demand Indicator light is green • Cooling system is running • No action is required.

Fan outputs turned off after 3-minutes • Pipe sensor is connected and water

temperarture between hot water and cold water

set points

• Building Boiler or Chillers may be turned off.

• See Service Menus 171, 172, 173 & 174

Menu Item Not available • Some service menus are disabled when not in

use or feature is not available.

• Verify system type selection and feature selection is correct.

Red LED is Flashing and code is in clock location • Fault is present on SC and S1 input • Check SM175 for code

• If using a remote sensor, verify probe wiring.

Visit: pecocontrolsystems.com for additional information.

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