PECO TW180 Thermostat Instruction Manual
TROUBLESHOOTING & FREQUENTLY ASKED QUESTIONS
In case of difficulty, 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 the thermsotat.
• Check power to verify that there is power (24-277 VAC) available.
• Default Display is set to “4” (None)
• Keypad Lockout may be enabled
• Check Service Menu 520.
If keys do not allow manual entry
Service Menu does not display
SETBACK is in the Display
• Access Service Menu 340. Within this menu, select option “0” to assure
there is no keypad lockout (so manual entry is enabled).
• 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.
• System is in setback
• Your thermostat has an occupancy detection system connected.
• Check connections between TB1-5, TB1-6, TB1-7
Dashes in the Temperature Display
• Remote Probe Error
• For remote probe use allow 5 minutes for thermsotat temperature to
stabalize.
• Check Service Menu 170 for correct selection.
Err In Clock Dispay
Door in Clock Display
Fdd in Clock Display
• Indicates a service fault input
• Indicates service is required.
• Door or window is open
• Close door and /or window to clear fault.
• Indicates service is required.
• Indicate an economizer or other system fault
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
• Power Jumper is not located properly at
terminal TB2.
• 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).
• Verify that the Power Jumper is in the correct position for your system
voltage. CAUTION: Do not move the Power Jumper to 24VAC position if
your system is running at line voltage.
If heating or cooling system doesn’t respond
• System type selection is incorrect
• 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
• 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
Fan outputs turned off after 3-minutes
• Cooling system is running
• Pipe sensor is connected and water
• No action is required.
• Building Boiler or Chillers may be turned off.
temperarture between hot water and cold water • See Service Menus 171, 172, 173 & 174
set points
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 a code is displayed in the
clock location
• Fault is present on TB1-3 and TB1-7
• Probe is not wired correctly or is wrong value.
• Check SM175 for code
• If using a remote sensor, verify probe wiring and type.
UL60730-1 Required Information:
Purpose of control: Operating Control,Room Thermostat
Type 1.C Action
Pollution Degree 2
Impulse Voltage: 2500 V
© COPYRIGHT 2023 PECO, INC. ALL RIGHTS RESERVED.
P/N 74150 3220-2384 REV 04
8
| General | Details |
|---|---|
| Name | PECO TW180 Thermostat Instruction Manual |
| Make | PECO |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.56 MB |

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