Mitsubishi Electric EHPT20X-VM2HA, Service Manual

Page: 73 / 76

73
13 SERVICE AND MAINTENANCE
Engineers form
The main controller settings changed from the default settings are reset by replacing the controller board. To facilitate reselecting settings on the main controller, it is
recommended to write down the changes in the sheet below before replacement.
Commissioning/Field settings record sheet
Parameters
Default
setting Field
setting
Notes
Main Option Forced DHW operation On/Off Off
DHW On/Off/Timer On
Heating
On/Off/Timer On
Holiday mode Active/Non active/Set time Non active
Setting DHW Operation mode Normal/Eco Normal
DHW max. temp 40°C – 60°C
50°C
DHW temperature drop
5°C – 30°C
10°C
DHW max. operation time 30 – 120 mins
60 mins
DHW mode restriction
30 – 120 mins
30 mins
Legionella prevention
Active Yes/No Yes
Hot water temp 60°C – 70°C
65°C
Frequency
1 – 30 days
15 days
Start time
00.00 – 23.00
03.00
Max. operation time 1 – 5 hours
3 hours
Duration of maximum temperature 1 – 120 mins
30 min
Heating
Operation mode
Heating Flow temp/Compensation curve/Room temp
Room temp
Heating room temp 10°C – 30°C
0°C
Heating flow temp 25°C – 60°C
45°C
Compensation
curve Lo set point Outdoor ambient temp
-15°C – 35°C
35°C
Flow temp 25°C – 60°C
5°C
Hi set point Outdoor ambient temp
-15°C – 35°C
-15°C
Flow Temp 25°C – 60°C
50°C
Adjust
Outdoor Ambient Temp
-14°C – 34°C
—
Flow temp 25°C – 60°C
—
Schedule timer Active Yes/No No
Holiday DHW Active/Non active Non active
Heating
Active/Non active Active
Heating room temp 10°C – 30°C
15°C
Heating flow temp 25°C – 60°C
35°C
Initial settings Language
ENG/PT/NOR/FIN/NL/DA/IT/SP/SW/GER/FR ENG
°C/°F °C/°F °C
Temp display On/Off Off
Time display hh:mm/hh:mm AM/AM hh:mm —
Room sensor setting TH1/Main RC/Room RC1-8/(Time/Zone)
TH1
Service menu Manual operation
Supplementary pump or 3 way valve On/Off
Off
Thermistor adjustment
-10°C — +10°C 0°C
Auxiliary setting Economy setting for
pump
Active/Not active Active
Time before pump switched off (3 – 60 mins)*1
10 mins
Freeze stat function Outdoor ambient temperature (3 – 20°C)
5°C
Electric heater
(Heating)
Space heating: Used/Not Used
Used
Electric heater delay timer (5 – 180 mins)
30 mins
Electric heater
(DHW)
DHW: Used/Not Used Used
Electric heater delay timer (15 – 30 mins)
15 mins
Heat source setting
Standard/Heater Standard
Operation setting
Simultaneous
operation Active/Inactive Inactive
Outdoor ambient temperature (-15 – 10°C)
-15°C
Cold weather function
Active/Inactive Inactive
Outdoor ambient temperature (-15 – -10°C)
-15°C
Room temp control
(Heating)
Temperature control interval (10 – 60 mins)
10 mins
Flow temperature range (Maximum temp.)
(35 – 60°C)
50°C
Flow temperature range (Minimum temp.)
(25 – 40°C)
30°C
*1 Decreasing “time before pump switched off” may increase the duration of stand-by in Heating mode.