Failure Code Overview - ITS Telecom ITS-4.7HDP Installation Instructions Manual

6. FAILURE CODE OVERVIEW

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