Legionella Cleaning Cycle; Maintenance; Troubleshooting - Elwa HOTRUN-VE 38VE Operating And Installation Instructions

A service technician can program a HOTRUN-VE model to run through a Legionella Cleaning
Cycle. The purpose of the Legionella Cleaning Cycle is to provide a thermal disinfection of
fixtures downstream of the HOTRUN water heater. A cycle will run for >10 minutes at a
temperature of >60°C as per the current Australian Health Ministers' Regulations and directions
given to ELWA in every State of Australia. ELWA can organise this service for all customers
who have a HOTRUN-VE model installed with models produced from 2015 onwards. During the
Legionella cleaning cycle the display shows the count-down time of the cycle (600 seconds) until
completion, and then remembers all its previous settings for normal operation.
- Due to its advanced design the HOTRUN does not require any maintenance.
- To clean cover, use damp cloth only.
- Scouring and dissolving agents are not suitable.
- Regularly remove debris or scale building up in shower heads and in tap-aerators.
Fault Code Most likely cause
F1 Temperature sensor not connected or faulty (reconnect or replace temperature sensor)
F0 Temperature sensor short circuit (replace temperature sensor)
HH Too high inlet or outlet temperature >75°C ± 5°C
LL Inlet water temperature too low < 3°C
LF Inlet water flow too low (can come up for a few seconds during normal start-up)
OT Over Temperature/Over Pressure safety switch tripped (reset button)
Initial checks
- Adequate supply and pressure of the water (min. 60kPa).
- Make sure the cold water inlet and the hot water outlet are not connected in reverse.
- The main switch or circuit breaker is switched on.
- The fuse/circuit breaker is not blown / triggered.
- Flow rate from the tap needs to be higher than the minimal flow-rate of the model
installed to activate the heating elements.

Legionella Cleaning Cycle

Maintenance

Troubleshooting