ITS Telecom ITS-17VD, Installation Instructions Manual

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13
Wire
controller
PP1
PP2
PP3
PP4
PP5
PP7
EE1
EE2
EE3
EE4
EE8
☆●
(1 flashes & 1 pause)
☆☆●
(
2
flashes & 1 pause)
☆☆☆●
(3 flashes & 1 pause)
☆☆☆☆●
(4 flashes & 1 pause)
☆☆☆☆☆●
(5 flashes & 1 pause)
☆☆☆☆☆☆●
(6 flashes & 1 pause)
☆☆☆☆☆☆☆●
(7 flashes & 1 pause)
☆☆☆☆☆☆☆☆●
(8 flashes & 1 pause)
☆☆☆☆☆☆☆☆☆●
(9 flashes & 1 pause)
☆☆☆☆……
(continuous flashes)
PP6
Communication
failure
Defrosting
Standby status
Communication failure
between PCB and controller Check if connection in good condition
or replacement needed.
Check if EE valve broken and
replacement needed.
1.Check if dry filter jammed.
2.Failure of EE valve.
3.Lack of refrigerant.
1.Too much refrigerant filled
in.
2.Liquid-like refrigerant
flows from evaporator into
compressor.
3.EE valve failure.
Too low ambient temp. and
water entering temp.
1.Discharge certain refrigerant.
2.Check and adjust EE valve, make
sure EE valve sensor is well
connected with return gas pipe.
3.Check if EE valve broken and
replacement needed.
Temp. sensor broken or not
enough refrigerant.
Temp. sensor short circuit
or open circuit.
Check if temp. sensor in good
conditions, or replace related
sensor.
1.Check,repair or replace filter.
2.Check if EE valve broken and
replacement needed.
3.Refill certain refrigerant.
No action required.
Replace temp. sensor or
fill in certain refrigerant.
Reserved
Reserved
Low working
pressure protection
High working
pressure protection
Winter anti-freeze
protection
Reserved
Ambient temp.
sensor failure
Return gas temp.
sensor failure
System coil temp.
sensor failure
Discharge gas temp.
sensor failure
Inlet water temp.
sensor failure
Running status
OFF
OFF
ON
OFF
Protection
/
Failure
PCB LED indicator Possible cause Check & solution
6. FAILURE CODE OVERVIEW
Applicable models:
ITS-4.7HDP