Service And Maintenance - Mitsubishi Electric EHST20C-VM6HA Service Manual

SERVICE AND MAINTENANCE

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