Troubleshooting - Hydro-Pro HYDRO PRO5 Bedienungsanleitung

8. Troubleshooting

8.1 Error code display on LED wire controller
Malfunction
Inlet water temperature
sensor failure
Outlet water temperature
sensor failure
Heating condenser
sensor failure
Gas return sensor failure
Ambient temperature
sensor failure
Temperature difference
between water inlet and
outlet is too much
Cooling outlet water
temperature is too low
First grade antifreeze
protection in Winter
Second grade antifreeze
protection in Winter
Cooling condenser
sensor failure
High pressure protection
Low pressure protection
Flow switch closed
Power supply
connections wrong (for 3
phase unit)
Inlet and outlet water
temperature difference
malfunction
Communication failure
Error code Reason
PP1 The sensor in open or short
circuit
PP2 The sensor in open or short
circuit
PP3 The sensor in open or short
circuit
PP4
Connect some wire wrongly on
gas return sensor position
PP5 The sensor in open or short
circuit
PP6 Water flow volume not
enough ,water pressure
difference is too low
PP7 Water flow volume is not
enough
PP7 Ambient temperature or water
inlet temperature is too low
PP7 Ambient temperature or water
inlet temperature is too low
PP8
Connect some wire wrongly on
gas return sensor position
EE1 1. Refrigerant is too much
2. Air flow is not enough
EE2 1. Refrigerant is not enough
2. Water flow is not enough
3. Filter jammed or capillary
jammed
EE3 or "ON" Low water flow, wrong flow
direction, or flow switch failure.
EE4 Wrong connection or lack of
connection
EE5 Water flow volume is not
enough ,water pressure
difference is too low
EE8 Wire connection is not good
- 31 -
Solution
Check or change the sensor
Check or change the sensor
Check or change the sensor
Confirm there is nothing on this
point, restart the machine
Check or change the sensor
Check the water flow volume or
water jammed or not
Check the water flow or water
system is jammed or not
Water pump will run
automatically for first grade
antifreeze
Heat pump will start heating for
second grade antifreeze
Confirm there is nothing on this
point, restart the machine
1. Discharge redundant
refrigerant from HP gas
system
2. Clean the air exchanger
1. Check if there is any gas
leakage ,re-fill the
refrigerant
2. Clean the air exchanger
3. Replace the filter or
capillary
Check if the water flow is
enough and flow in right
direction, or else the flow switch
could be failed.
Check the connection of power
cable
Check the water flow rate ,or
water system is jammed or not
Check the wire connection