SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING
OMM-0147_C
• SP-102 • 3/2/2021 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
43
of
72
TABLE 7-1. Troubleshooting
– Control Valve and Piping Assembly
No.
Fault Indication
Probable Cause
Corrective Action
T3
(Continued)
5. Control Valve is not
opening properly.
6. Heat exchanger scaled
on DHW side.
7. Heat exchanger is
fouled on boiler water
side.
8. Heat exchanger is
scaled on boiler water
side
9. Heat exchanger is too
small for load.
5. Check Auto-Stroke to make sure the
actuator is traveling throughout the
complete 90° range. See Section 4.2.2:
3-Way Valve Stroke Adjustment
.
6. Clean and de-scale heat exchanger.
7. Proceed as follows:
a. Close isolation valves
b. Clean strainers
8. Clean or de-scale heat exchanger.
9. Reduce load or resize heat exchanger.
T4
Wide variation in Water
Heater outlet temperature
during wide variations in
flow
1. ECS II Flow Meter is
not functioning
properly.
1. Refer to Table 7-2 and check the
operation of the Flow Meter temperature
sensor.
T5
Rapid fluctuations in
heater outlet temperature
which do not follow load
changes
1. Temp. Controller is not
functioning properly.
1. Refer to Table 7-2 and troubleshoot the
Temp. Controller.
In addition to the troubleshooting steps above, review the Stroke Adjustment procedure in
Section 4.2.2, and verify that the K-value on the Flow Meter is set properly. The K-Value can be
viewed by selecting “Set K” on the flow meter’s display and comparing to the value tagged on
the flow meter tee.
TABLE 7-2. Troubleshooting
– Electronic Control System (ECS II)
No.
Fault Indication
Probable Cause
Corrective Action
T1
System not operating.
All displays are blank.
1. External 120-230
VAC/50-60Hz power
disconnected.
2. Defective fuse on side
of Power Box.
3. Defective
ENABLE/DISABLE
switch on Control Box.
1. Ensure external circuit breaker is ON.
Check for 120-230 VAC/50-60Hz power
across the L and N terminals on the Power
Box.
2. Check the fuse on the right side of the
Control box. Replace if blown.
3. Set ENABLE/DISABLE switch to the
ENABLE (Up) position and verify that the
switch indicator lights. Also:
a. Verify that 120-230 VAC is present
across the L and N terminals on the
Power Box.
b. If voltage not present, replace
ENABLE/DISABLE switch.