22
Check Code Abnormal point and detection method
Case
Judgment and action
P8
Pipe temperature
Abnormal if the following conditions are
detected for continuously 3 minutes after
compressor starts operating for 10 minutes.
1. Cooling mode
T
63HS−
TH7
[
2
:
and
TH3−TH7
[
4
:
or T
63HS
−TH3 < 0
:
and
TH32−TH6
[
0
:
and
Compressor operation frequency is 61Hz or more.
2. Heating mode
T
63HS
−TH32
[
2
:
and
TH6−TH32
[
1
:
and
TH7−TH3
[
1
:
and
Compressor operation frequency is 61Hz or more.
T
63HS
: Condensing temperature of pres
-
sure sensor (63HS)
Thermistor
TH3: Liquid temperature
TH32: Inlet water temperature
TH6: Plate HEX Liquid temperature
TH7: Ambient temperature
1
Leakage or shortage of
refrigerant
2
Malfunction of linear expansion
valve
3
Refrigerant circuit is clogged
with foreign objects.
Note: Clogging occurs in the
parts which become below
freezing point when water
enters in refrigerant circuit.
4
Disconnection of thermistor
holder.
1
Check intake superheat.
Check leakage of refrigerant.
2
Check linear expansion valve.
3
After recovering refrigerant, remove water
from entire refrigerant circuit under vacuum
more than 1 hour.
4
Check temperature display on outdoor
controller circuit board.
Temperature display is indicated by setting
SW2 of outdoor controller circuit board.
Check the holder of thermistor.
UE
Abnormal pressure of pressure sensor
(63HS)
Abnormal if pressure sensor (63HS) detects
0.1 MPa or less.
Detection is inoperative for 3 minutes after
compressor starting and 3 minutes after
and during defrosting.
1
Disconnection or contact failure of
connector (63HS) on the outdoor
controller circuit board
2
Defective pressure sensor
3
Defective outdoor controller
circuit board
1
Check connection of connector (63HS) on the outdoor
controller circuit board.
Check breaking of the lead wire for thermistor (63HS).
2
Check pressure by microcomputer. (Pressure
sensor/ 63HS) (SW2: Refer to "8-7. OUTDOOR
UNIT OPERATION MONITOR FUNCTION".)
3
Replace outdoor controller circuit board.
PE
Inlet water temperature
Abnormal if the following conditions are
detected for continuously 10 seconds.
1. Cooling mode
During compressor operation
TH32 < 3
:
2. Heating mode (exclude defrosting)
During compressor operation
TH32 < −10
:
3. Defrosting mode
During compressor operation
TH32 < 0
:
Thermistor
TH32: Inlet water temperature
1
Reduced water flow
· Clogged filter
· Leak of water
2
Low temperature
· Low-load
· Low temperature inlet water
3
Defective water pump
4
Leakage or shortage of refrig
-
erant
12
Check water piping.
3
Check water pump.
4
Check intake superheat.
Check leakage of refrigerant.
OCH605A
Summary of Contents for ecodan PUHZ-W50VHA2
Page 57: ...57 OCH605A ...
Page 60: ...Ecodan FTC5 Databook M P0729 ...
