Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 24

<Summary of settings>
This function shows the current installer/user entered settings.
Abbreviation Explanation
HWtemp DHW supply max. temp.
HWdrop DHW supply max. temp. drop
HWtime DHW max operation time
NO HW DHW mode restriction
HWset DHW operation mode (Normal)
HWvol DHW storage volume
Z1 mode Operation mode
- HER (Heating room temperature)
- HE (Heating flow temperature)
- HCC (Heating compensation curve)
Z2 mode Operation mode
- HER (Heating room temperature)
- HE (Heating flow temperature)
- HCC (Heating compensation curve)
<Error history>
Error history allows the service engineer to view previous Error codes, the unit
address and the date on which they occurred. Up to 16 Error codes can be stored
in the history the most recent Error event is displayed at the top of the list.
1. From the service menu select Error history
2. Press CONFIRM.
Please see chapter 10-4. for error code diagnosis and actions.
To delete an Error history item;
1. From Error history screen press F4 button (Rubbish bin icon)
2. Then press F3 button (Yes).
<Password protection>
Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
1. From the service menu use F1 and F2 buttons to scroll through list until
Password protection is highlighted.
2. Press CONFIRM.
3. When password input screen is displayed use buttons F1 and F2 to move left
and right between the four digits, F3 to lower the selected digit by 1, and F4 to
increase the selected digit by 1.
4. When you have input your password press CONFIRM.
5. The password verify screen is displayed.
6. To verify your new password press button F3.
7. Your password is now set and the completion screen is displayed.
GCH15010
Abbreviation Explanation
Hroom 1 Heating target room temperature
Hroom 2 Heating target room temperature
Hflow 1 Heating target flow temperature
Hflow 2 Heating target flow temperature
Croom 1 Cooling target room temperature
Croom 2 Cooling target room temperature
Cflow 1 Cooling target flow temperature
Cflow 2 Cooling target flow temperature
FSflow Freeze stat function flow temperature
FSout Freeze stat function ambient temperature
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Password input screen
Password verify screen