ICC ETH-1000, Installation Manual

Page: 51 / 54

51
Modbus / Electric Water Heaters
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Table 44. ModBus / Electric Water Heaters Central Control Board (CCB) State
Value State
0
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6 Heating
8 Fault
Energy Management System (EMS) Control
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ELWVHWVLWLQ(06PRGHDQGRWKHUHQGV(06PRGH2QFHLQ(06PRGHDQRWKHUELWFRPPDQGELWHQDEOHVKHDWLQJDQRWKHU
disables heating.
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otherwise the heater will end EMS mode and resume normal operation.
Table 45. ModBus /Electric Water Heaters Energy Management System (EMS) Control
Decimal Hex Value Response
3840 0x0F00 No EMS control
[
3841 0x0F01 Put into EMS Mode^
[&
0000 0x0000 EMS Disable heating^
[&
0001 0x0001 EMS Enable heating^
[&
3584 0x0E00
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EMS mode ends.) 15 seconds or less recommended
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on whether or not heating is enabled.
NOTE:
The start of a heating cycle also depends on other factors, like
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if that option is enabled.
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After disabling EMS mode with write of 3840, read-back might have bits 14 and 1 possibly still set. To make sure these bits are clear,
write a 0000 to clear bit 1 and 3584 to clear bit 14.
Fault Codes and Warnings
Note:
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Table 46. BACnet/Electric Water Heaters Fault Codes and Warnings
Index Range
(Decimal)
Index Range
(Hex Code) Value
0 0 0x000 0x000
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1 6 0x001 0x006 Memory
24 0x018 Incorrect Model
51 56 0x033 0x038 Power Monitor
69 72 0x045 0x048 Temperature Probe Open or Short
153 154 0x099 0x09A Communications Fault
165 0x0A5
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175
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Safety Relay Closed fault
176 188
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193 194 0x0C1 0x0C2 Processor Clock
198 201 0x0C6 0x0C9 Non-volatile Memory
205 217 0x0CD 0x0D9 Powered Anode
431 0x1AF Safety Relay Opened fault
1037 1037 0x40D Element Open Warning