tekmar 371 House Control - Manual (Page 18)

18
System Pump 2 • The relay contacts between Sys P2—Power L (1 and 4) are closed and the mixing system pump (P2)
should be running.
System Pump 1 • The relay contacts between Sys P1—Power L (2 and 4) are closed and the boiler system pump (P1)
should be running.
Boiler • The relay contacts between Boiler — Boiler (20 and 21) are closed and the boiler should be turned on.
Zone 5 / Close • The relay contacts between Com 3-4— Cls 5 (28 and 31) are closed and the device connected to this relay
should be turned on. If a mixing valve is used, it should be closing.
Zone 4 / Open • The relay contacts between Com 3-4— Opn 4 (28 and 30) are closed and the device connected to this
relay should be turned on. If a mixing valve is used, it should be opening.
Zone 3 • The relay contacts between Com 3-4— 3 (28 and 29) are closed and the device connected to this relay
should be turned on.
Zone 2 • The relay contacts between Com 1-2— 2 (25 and 27) are closed and the device connected to this relay
should be turned on.
Zone 1 / Cool • The relay contacts between Com 1-2— 1 (25 and 26 ) are closed and the device connected to this relay
should be turned on.
% of full output lights • These lights indicate the percentage of full speed the variable speed injection pump is operating at.
Test • The control is proceeding through the programmed test sequence.
Occupied • The control is in Occupied mode.
UnOccupied • The control is in UnOccupied (Night Setback) mode.
Optimum Start / Stop • The control is warming the building up during the final stages of the UnOccupied period, or the heating
system is turned off during final stages of the Occupied period.
Timer Active • The timer is set to enter the UnOccupied mode every 24 hours at the time of the day the Start button was
pressed.
STEP EIGHT TROUBLESHOOTING
As in any troubleshooting procedure, it is important to isolate a problem as much as possible before proceeding. The Error Messages
and
Test button greatly simplify troubleshooting of the 371. When the control is flashing an Error Message, identify the fault from the
look-up table on page 19 and follow standard testing procedures to confirm the problem. If you suspect a wiring fault, return to steps
three, four and five, and carefully check all external wiring and wiring connections.
Sensor and Internal Faults

• If an Outdoor Sensor fault occurs, the 371 assumes a fixed outdoor temperature of 32
°
F (0
°
C) and will regulate the supply water
temperature accordingly. An error message is displayed.
• If an RTU / Indoor Sensor fault occurs or the Zone Control input Zo - in short circuits, the 371 operates as if that RTU or Zone Control
is not connected. An error message is displayed.
• If the enclosure overheats, the 371 turns off the variable speed injection pump and displays an error message until it cools off.
• If an internal control fault occurs, the 371 displays an error message. Press the Test button to clear the error message. If the error
message remains, the control must be returned for repair.
• If a Supply Sensor fault occurs, the 371 displays an error message and turns the variable speed injection pump off. If a mixing valve
is used, the control closes the valve.
• If a Boiler Sensor fault occurs, the 371 displays an error message and turns the Boiler relay off.
During Floating Operation
• If an RTU is connected to zone 4 and the zone 4 DIP switch is set to Boiler, the control displays an error message.
• If an RTU is connected to zone 5 and the zone 5 DIP switch is set to Boiler, the control displays an error message.
Adjustment of Heating Curve Settings
• If the outdoor air temperature is cold and the RTU dials are set properly, but the boiler zones are cold, increase the Boiler Heating
Curve dial setting by 1/2 an increment segment per day.
• If the outdoor air temperature is cold and the RTU dials are set properly, but the mixing zones are cold, increase the Heating Curve
dial setting by 1/2 an increment segment per day.