AERCO SmartPlate User Manual
Page 49
SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 7 – TROUBLESHOOTING
OMM-0069_0E
AERCO International, Inc.
100 Oritani Dr. Blauvelt, NY 10913
Page 49 of 138
SP-100
Phone: 800-526-0288
PRI: 11/26/2013
Table 7-1. Troubleshooting – Control Valve MXG-461 and Piping Assembly – Cont.
No.
Fault Indication
Probable Cause
Corrective Action
T3
System outlet water
temperature is below
desired setpoint
1. Boiler water inlet
strainer is clogged
2. Boiler water temp is
too low.
3. Boiler water flow rate
too low.
4. Temp controller is
not properly set.
1. Check the strainer differential pressure
gauge. If gauge is in the “RED” area,
blow down the strainer and re-check
until gauge is in the “GREEN” area.
2. Check the Boiler Water IN temperature
on the Control Box display indicator.
Verify that the temperature is equal to
the boiler water temperature to which
the unit was sized.
3. Check system pump and measure flow
rate to the SmartPlate with an ultra-
sonic meter.
4. Refer to Chapter 4, para. 4.3.1 and
check the current setpoint temperature
setting on the Temp Controller. If the
setting is below the desired setpoint,
readjust as necessary.
T3
(Continued)
5. Control Valve is not
opening properly.
6. Heat Exchanger is
fouled on boiler water
side.
7. Heat Exchanger is
scaled on boiler
water side
8. Heat Exchanger is
too small for load.
5. Remove Electronics module cover on
Valve and view the Status LEDs. See
Table 7-1A to check the Valve status.
6. Proceed as follows:
a. Close isolation valves
b. Clean strainers
7. Clean or de-scale Heat Exchanger.
8. Reduce load or resize Heat Exchanger.
T4
Wide variation in Heater
outlet temperature during
wide variations in flow
1. ECS/SP mixed water
temperature sensor
is not functioning
properly
2. DHW internal
Recirculation Pump
is not functioning
properly
1. Refer to Table 7-2 and check the
operation of the mixed water
temperature sensor.
2. Proceed as follows:
a. Check the fuse on the side of the
ECS Control Box and replace if
blown.
b. Check input power to Recirculation
Pump.
c. Check the temperature of the copper
tube above the Pump. It should be
the
same as the outlet DHW
temperature.
If cold, repair or replace pump as
required.