Overview Of Failure Code On Display (Led Controller) - GRE BC3800 Instruction Manual

16. Overview of failure code on Display (LED controller)

Wire
Protection/Failure
controller
Inlet water temp. sensor
PP01/PP1
failure
Outlet water temp. sensor
PP02/PP2
failure
PP03/PP3 Coil 1 temp. sensor failure
PP04/PP4 Coil 2 temp. sensor failure
PP05/PP5 Ambient temp. sensor failure
Protection for excessive
PP06/PP6 temp. difference between
water inlet & outlet
Anti-freeze protection for
PP07/PP7
cooling
Winter anti-freeze protection
PP07/PP7
Ⅰ
Winter anti-freeze protection
PP07/PP7
Ⅱ
EE03/EE3 Water flow switch failure
EE01/EE1 High or Low pressure
EE06/EE6 protection
Failure of excessive temp.
EE05/EE5 difference protection between
water inlet & outlet
EE08/EE8 Communication failure
Check
1. Check the connection of inlet
water sensor.
2. Check if the sensor is broken.
1. Check the connection of outlet
water sensor.
2. Check if the sensor is broken.
1. Check the connection of coil 1
temperature sensor.
2. Check if the sensor is broken.
1. Check the connection of coil 2
temperature sensor. temperature
2. Check if the sensor is broken.
1. Check the connection of ambient
temperature sensor.
2. Check if the sensor is broken.
1. Check if there is any blockage in the
water circuit.
2. Check if the water flow volume is
enough.
3. Check if the water pump is working.
Refer to PP06.
No action required
No action required
1. Check water flow.
2. Check if water pump is working.
3. Check if flow switch is broken.
4. Check if wiring diagram connection
of flow switch is correct.
1. Check if lack refrigerant is too low
(for low pressure).
2. Ambient temp. or water inlet temp.
is too low (for low pressure).
3. Check if there is a blockage in water
circuit or if water flow is not enough
(for high pressure)
4. Check if high or low pressure switch
is broken.
5. Check if there is a blockage in
refrigerant circuit (for high pressure).
1. Check if there is enough water flow
volume.
2. Check if inlet / outlet water temp.
sensor is working.
Check the connection
- 10 -
Solution
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor. 2.
Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Remove the cause of the
blockage.
2. Increase the water flow
volume.
3. Repair or replace the water
pump.
Refer to PP06.
1. Increase water flow.
2. Repair or replace water pump.
3. Replace flow switch.
4. Reconnect the wiring.
1. Fill up with enough
refrigerant.
2. Check by reducing water flow.
3. Remove cause of blockage or
increase water flow.
4. Test by shorting the high
pressure switch or low pressure
switch. Must be changed by
refrigerant technician.
5. Must be checked and repaired
by refrigerant technician.
1. Increase water flow.
2. Replace sensor.
Change PCB and / or Display