evoheat Evo270 - Troubleshooting Guide

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EvoHeat Evo270 Hot Water Heat Pump Manual
7.1 Troubleshooting Guide
Malfunction
Display
Cause
Solution
Bottom water temp. failure
P01
The water bottom temp. sensor is open or
short circuit.
Check or change the water
bottom temp. sensor
Top tank water temp. failure
P02
The water top tank temp. sensor is open or
short circuit
Check or change the water
top tank temp. sensor
Ambient temp. failure
P04
The ambient temp. sensor is open or short
circuit
Check or change the
ambient temp. sensor
Coil temp. failure
P05
The pipe temp. sensor is open or short
circuit
Check or change the pipe
temp. sensor
Refrigerant absorb temp.
failure
P07
The evaporator temp. sensor is open or
short circuit
Check or change the
evaporator temp. sensor
Anti-freeze temp. failure
P09
The anti-freeze temp. sensor is open or
short circuit
Check or change the anti-
freeze temp. sensor
High pressure protection
E01
The exhaust pressure is high, high pressure
switch action
Check high pressure switch
and cooling return circuit
Low pressure protection
E02
The suction pressure is low, low pressure
switch action
Check low pressure switch
and cooling return circuit
Water flow failure
E03
No water or litter water in water system
Water, check for flow
volume pump failure
Electric-heater overheat
protection
E04
Water flow volume not enough, water
system pressure difference is small
Water, check if the flow
volume system is jammed
Anti-freeze protection
E07
Water flow volume not enough, water
system pressure difference is small
Water, check if the flow
volume system is jammed
Anti-freeze protect level 1
E19
Ambient temperature is too low
Anti-freeze protect level 2
E29
Ambient temperature is too low