Rinnai EHPS215VM Operation & Installation Manual page 11

NO WATER FROM THE TAP
Restriction in the hot tap or failure of the cold
water supply to the water heater
HIGH ELECTRICITY BILLS
Excessive hot water consumption
High Electricity Tariffs
Higher Element Usage
WATER FLOW FLUCTUATIONS
One or more hot taps opened at the same time
WATER HAMMER
Hot and cold water plumbing in the premises
HEAT PUMP ICES UP
Defrosting function
HEAT PUMP ERROR INDICATOR*
Error Error Description
code
E05 High pressure protection
E09 Communication fault
E12 Exhaust temperature too high
E14 Tank temperature sensor fault
E16 Coil temperature sensor fault
E18 Exhaust temperature sensor fault
E21 Ambient temperature sensor fault
E29 Suction temperature sensor fault
*If an error code is displayed on the control unit please contact Rinnai Customer Care Immediately.
Rinnai
Check for water flow at the other taps and that the cold
water isolation valve is fully open.
See entry under the heading 'Insufficient or no hot water'
The electricity tariff will determine the running costs of
the system. It is important the end user is aware of the
applicable tariffs. Contact your electricity supplier to
confirm what these tariffs are.
In extremely cold conditions the element may be
operating more than normal.
More than one or two hot taps in use at the same time
may cause a decrease in the hot water flow from the
taps.
Is there more than one or two hot taps open, or are
appliances such as a dishwasher or washing machine,
in use at the same time?
Ensure only one or two hot taps are on at one time.
Have a plumber check clipping of hot and cold water
pipe work and install a pressure limiting valve and water
hammer arrestor as required.
The heat pump has a built in hot bypass defrosting
function which may operate and remove any ice.
Possible Causes
High pressure switch is broken/Connection is loose
Signal wire connection loose/There is Strong magnetic
field/PCB is broken/Signal wire is broken
Lack of refrigerant/system leak
Sensor fault/Connection is loose
Sensor fault/Connection is loose
Sensor fault/Connection is loose
Sensor fault/Connection is loose
Sensor fault/Connection is loose
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EHPS Heat Pump OIM - Issue 1