EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
58
11. T
ROUBLESHOOTING
11.2. General symptoms
Symptom 10: Unexpected backup heater operation
A
PPENDIX
(for restricted power supply condition mode only)
First
code
Second
code
Setting name
Installer setting at variance with default value
Default
value
Range
Step
Unit
Date
Value
Date
Value
d
Restricted power supply condition mode/local shift value weather dependent
00
Not applicable. Do not change the default value.
0
0/1/2/3
1
—
01
Not applicable. Do not change the default value.
0 (OFF)
0/1/2
1
—
02
Restricted power supply condition mode
0 (OFF)
0/1
—
—
03
Local shift value weather dependent
0 (OFF)
0/1/2/3/4
1
—
04
Not applicable.
—
—
—
—
05
Pump operation forced off or permitted during
backup heater is forced off at benefit kWh rate
power supply ([d-00]=0 or 1)
0 (forced
off)
0/1
1
—
06
Not applicable.
—
—
—
—
E
Unit information readout
00
Software version
Read only
—
—
—
01
EEPROM version
Read only
—
—
—
02
Unit model identification. Do not change the default
value.
depending
on model
—
—
—
03
Liquid refrigerant temperature
Read only
—
1
°C
04
Inlet water temperature
Read only
—
1
°C
F
Option setup
00
Pump operation stop
0
(enabled)
0/1
1
—
01
Space cooling permission temperature
20
10~35
1
°C
02
Bottom plate heater ON temperature
3
3~10
1
°C
03
Bottom plate heater hysteresis
5
2~5
1
°C
04
Functionality of X14A
(a)
.
1
0/1
—
—
Underfloor heating screed dry-out program
05
Action number selection
1
1~20
1
—
06
Heating set point of selected action number [F-05]
25.0
(b)
15~55
1
°C
07
Time of selected action number [F-05]
0
0~72
12
hour
08
Underfloor heating screed dry-out program enabled/
disabled
0 (OFF)
0/1
1
—
09
Latest action number executed
0
0~21
(Read only)
0
—
(a) Only possible to modify the first 3 minutes after power ON.
(b) For all action numbers of [F-05].
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Entering water temperature is too
low and leaving water temperature
>25°C.
Increase the water flow.
Too frequent use of the backup
heater during heating operation or
domestic water heating.
The water volume in the cicuit is too
low.
