Water Controllers - Rinnai REU-VR1620WG Service Manual

4. Water Controllers

All water controllers must be installed in accordance with the relevant operation/installation instructions
supplied with the water heater or controllers.
Care should be taken to ensure power supply to the Infinity is isolated when
connecting / disconnecting controller wiring or transponder on wireless controllers.
NOTE
Failure to isolate power supply may result in damage to the appliance PCB.
Care should be taken when closing the Ezi-connect access panel, to ensure internal
wiring for controllers is not shortened or crushed.
Trouble shooting
Water Controller not showing display - (Wired Water Controllers)
• Check that the correct number and combination of controllers have been installed for the specific
model Infinity. Refer to controller compatibility table below.
• Check controller is turned ON.
• Check there is 12VDC power supply available to the controller from the Ezi-connect terminals.
• If there is 12VDC available from the Ezi Connect but no controller display, check wiring between
Ezi-connect and controller is sound.
• If there is no power from the Ezi-connect terminals, but the hot water functions correctly, replace
PCB.
Error Code 12 as soon as hot water tap is turned ON.
• Check 12VDC internal wiring to Ezi-connect terminal is not crushed, or shortened.
• Rectify wiring and re-close Ezi-connect cover carefully.
Water Controller not showing display - (Wireless Water Controllers)
• Ensure transceiver module is mounted in the correct location, as per wireless controller installation
instructions.
• Ensure 2 x AA batteries are in good working order and installed with the correct polarity within the
wireless controller. (Battery polarity details on rear of wireless controller)
• Ensure distance between wireless controller and transceiver does not exceed 50 metres.
• Ensure channel has been allocated to each wireless controller.
• Ensure wireless controller has been programmed to the transceiver correctly, as per wireless
controller installation instructions.
Water Controller Compatibility Table
A maximum of 4 wireless water controllers can be fitted with the following limitation:
Wireless Only
Only ONE MC-502RC or MC-503RC can be set as the Master Controller.
Installation
A maximum of 4 water controllers can be fitted. Any combination of deluxe, universal and
wireless controllers can be used with the following limitation:
Only ONE master controller can be installed. This can be a MC-100V, a MC-91Q (when
Wired &
programmed as a master controller) or a MC-502RC or MC-503RC water controller.
Wireless
Installations
Up to TWO BC-100V water controllers can be installed.
The FOURTH water controllers in any installation MUST BE a MC-502RC/MC-503RC
or a MC91Q.
REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 6 - Issue 1 - 5/08/09 ©Rinnai