SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING
OMM-0147_C
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TROUBLESHOOTING
7.1 INTRODUCTION
The troubleshooting procedures provided in this chapter are intended to aid service and
maintenance personnel in isolating the most probable cause of a fault in a packaged SmartPlate
EV Water Heater. Prior to performing the troubleshooting steps and procedures in this chapter,
perform the following preliminary checks:
TROUBLESHOOTING Instructions
1. Ensure that external AC power of 120-230 VAC/50-60Hz is supplied to the ECS II Control
Box.
2. Ensure that all Electronic Control System (ECS II) electrical cable connections are secure.
3. Ensure that the 3-Way Control Valve actuator is securely connected to the cable plug from
the ECS II Control Box.
4. Check the fuse in the ECS II Control Box; it supplies power to the 3-Way Control Valve.
5. Ensure that both the upstream and downstream shut-off valves are fully open.
6. Check the circuit breaker on the 24 VDC Transformer inside the ECS II Control Box.
NOTE:
In addition to the procedures contained in this chapter, also check the troubleshooting
sections of the Boiler Operation and Maintenance Manual being used with the Water Heater
and any other ancillary equipment manuals associated with the installation.
7.2 TROUBLESHOOTING PROCEDURES
Troubleshooting procedures for SmartPlate EV Water Heaters are provided in Tables 7-1, 7-2
and 7-3. Table 7-1 provides troubleshooting procedures for the Control Valve and Piping
Assembly components. Table 7-2 provides troubleshooting procedures for the ECS II Electronic
Control System. Table 7-3 provides a troubleshooting guide to aid in resolving temperature
control issues which may be encountered during Water Heater operation. Also, when
troubleshooting ECS II faults related to the Temperature Controller, refer to Appendix A for
additional information concerning process fault and diagnostic alarms.
When a fault occurs in a SmartPlate EV Water Heater, proceed as follows to isolate and correct
the fault:
TROUBLESHOOTING PROCEDURES Instructions
1. Refer to the FAULT INDICATION column in the following tables and locate the fault that
best describes the existing conditions.
2. Proceed to the PROBABLE CAUSE column and, if more than one item is listed, start with
the first item shown for the fault condition.
3. Perform the corresponding checks and procedures listed in the CORRECTIVE ACTION
column for the first PROBABLE CAUSE.
4. Continue checking each additional PROBABLE CAUSE for the existing fault until the fault
has been corrected.
