(307IO) HEAT PUMP ENGLISH 7.5” X 10.3” PANTONE 295U 12/15/2016
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307
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SAVE THESE INSTRUCTIONS
English
Page 18
SERVICE BY QUALIFIED TECHNICIANS (continued)
LED Display Error Code
ERROR CODE
SHOWN ON LED
DISPLAY
CAUSE SOLUTION
• Frost on evaporator fins:
ambient air temperature is lower
than the minimum operating air
temperature range 8°C.
• Check ambient air temperature variation, specially from day
time to mid-night. Wait until ambient air temperature rises for
the heat pump to start up.
• Switch off unit for few minutes and switch on again, check
if: a) fan is not running, replace damaged fan motor. b) fan is
running, then make sure adequate air circulation, see
“Location and Space Requirement” section.
• Water inlet temperature sensor
broken.
• Check T1 temperature sensor connection.
• T1 temperature sensor broken, replace T1 sensor.
• Terminal block for T1 connection on PCB broken, replace
PCB.
• Water outlet temperature sensor
broken.
• Check T2 temperature sensor connection.
• T2 temperature sensor broken, replace T2 sensor.
• Terminal block for T2 connection on PCB broken, replace
PCB.
• Evaporator fins temperature
sensor broken.
• Check T3 temperature sensor connection.
• T3 temperature sensor broken, replace T3 sensor.
• Terminal block for T3 connection on PCB broken, replace
PCB.
• Ambient air temperature sensor
broken.
• Check T5 temperature sensor connection.
• T5 temperature sensor broken, replace T5 sensor.
• Terminal block for T5 connection on PCB broken, replace
PCB.
• High pressure protection.
• Check bypass valves setting.
• Check system water flow is according to “Product
Specification” section.
• Check high pressure sensor connection (HP & GND).
• High pressure sensor broken, replace it.
• Terminal block for high pressure sensor connection on PCB
broken, replace PCB.
• Low pressure protection.
• Check for refrigerant gas leakage, see “Refrigerant Gas
Pressure Verification” section. Refill as needed.
• Ambient air temperature is lower than the minimum
operating air temperature range, wait until ambient air
temperature rises.
• Switch off unit for few minutes and switch on again, check if:
a) fan is not running, replace damaged fan motor. b) fan is
running, then make sure adequate air circulation, see
“Location and Space Requirement” section.
• Check low pressure sensor connection (LP & GND).
• Low pressure sensor broken, replace it.
• Terminal block for low pressure connection on PCB broken,
replace PCB.
Or
• No water flow or low water flow.
• Verify if water inlet and outlet hoses/pipes are connected
correctly.
• Ensure pool inlet and outlet cover grid is clean and free from
obstructions.
• Check if filtration pump is working.
• Clean or replace the cartridge or sand media if necessary.
• Check bypass valves setting.
• Keep the pool water properly sanitized.
• Water flow sensor broken, replace it.
• Check flow sensor connection (FS & GND).
• Communication failure.
• Check electrical connection between control unit panel and
main PCB. Replace control unit panel.
• Check control wire connection (NET).
• PCB terminal connection block broken, replace PCB.
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