Summary Of Settings; Error History; Password Protection; Resetting The Password - Mitsubishi Electric EHST17D-VM2D Service Manual

<Summary of settings>
This function shows the current installer/user entered settings.
Abbreviation Explanation
HWtemp DHW max. temperature
HWdrop DHW temperature drop
HWtime DHW max. operation time
NO HW DHW mode restriction
HWset DHW operation mode (Normal/Eco)
Ltemp Legionella hot water temperature
Lfreq Legionella operation Frequency
Lstart Legionella mode start time
Ltime Legionella max. operation time
Lkeep Duration of max. (Legionella) hot
water temperature
Z1 mode Operation mode
- HER (Heating room temperature)
- HE (Heating flow temperature)
- HCC (Heating compensation curve) Cflow 2
- COR (—)
- CO (Cooling flow temperature)
<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 "10-4. Self diagnosis and action" 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.

Resetting the password

If you forget the password you entered, or have to service a unit somebody else
installed, you can reset the password to the factory default of 0000.
1. From the main settings menu scroll down the functions until Service Menu is
highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 seconds
5. You will be asked if you wish to continue and reset the password to default set-
ting.
6. To reset press button F3.
7. The password is now reset to 0000.
<Manual reset>
Should you wish to restore the factory settings at any time you should use the
manual reset function. Please note this will reset ALL functions to the factory de-
fault settings.
OCH714A
Abbreviation Explanation
Z2 mode Operation mode
- HER (Heating room temperature)
- HE (Heating flow temperature)
- HCC (Heating compensation curve)
- COR (—)
- CO (Cooling flow temperature)
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
Cooling target flow temperature
FSflow Freeze stat function flow temperature
FSout Freeze stat function ambient temperature
38
Password input screen
Password verify screen