heat-timer ETS-100, Installation And Operation Manual

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059327–00 REV. C HEAT-TIMER CORP.
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45
SYMPTOM POSSIBLE CAUSE RECOMMENDED ACTION(S)
ETS-LT Control Module
Control Module does
not move the Floating
Motorized Valve. Valve wiring defective. Verify all wiring is in good condition and connected.
Verify voltage at the Actuator power terminals is between
20–24Vac. Voltage levels outside this range may cause the
Actuator to not move or result in damage to the Actuator.
Valve modulating signal
incorrect. Verify the ETV modulating signal is set to 0–10V to match
the Actuator’s signal. Use a DC voltmeter to read the
modulation signal on terminals 13 and 15.
If the Modulation Output % was at 40% (see “Default
Display” on page 22) , the signal should read 4Vdc. If it
did not, the ETV control is damaged. Replace the ETS-LT
Control Module.
Actuator manual override
engaged. Ensure the actuator is not in manual override.
Outlet temperature
fluctuates. The ETS-LT Control
Module requires the use
of a circulating loop with a
constantly running pump. Verify proper operation of the recirculation pump.
Output temperature
exceeds setpoint. Improper piping. If the Valve Modulation is at 0% during the time the outlet
temperature exceeds the setpoint and does not decrease,
check for heat migration from the water heating source
through the COLD inlet piping to the valve.
No alarm output. No power to the alarm or
interface wiring disconnected. Verify the alarm is receiving power, all power and interface
wiring is in good condition and connected.
The ETV does not provide power to alarms. Ensure an
external power source is used.
No communication. Incorrect network settings. Ensure the network settings are correct. Refer to the
troubleshooting section of the applicable network manual.
08
TROUBLESHOOTING