Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 19

<Thermistor adjustment>
This function allows adjustments to be made to the thermistor readings from
-10 – 10°C in 0.5°C intervals.
THW1: Thermistor (Flow water temp.)
THW2: Thermistor (Return water temp.)
THW3: Thermistor (Flow water temp.(to tank))
THW4: Thermistor (DHW supply temp.)
THW5A: Thermistor (Stored water temp.(upper))
THW5B: Thermistor (Stored water temp. (lower))
THW6: Thermistor (Zone1 flow temp.)
THW7: Thermistor (Zone1 return temp.)
THW8: Thermistor (Zone2 flow temp.)
THW9: Thermistor (Zone2 return temp.)
THWB1: Thermistor (Boiler flow temp.)
THWB2: Thermistor (Boiler return temp.)
Note : THW6-9,THWB1-B2 can not be adjusted.
<Auxiliary settings>
This function is used to set the parameters for any auxiliary parts used in the system
Menu subtitle Function/ Description
Economy settings for Water pump stops automatically a specified period of time from when operation is
finished.
pump
Delay Time before pump switches off*1
Electric heater To select "WITH booster heater (ON)" or "WITHOUT booster heater (OFF)" in
(Heating) Heating mode.
Delay The minimum time required for the booster heater to turn ON after Heating mode
has started.
*1. Decreasing "time before pump switched off" may increase the duration of stand-by in Heating mode.
Economy settings for pump
1. From the Auxiliary settings menu highlight Economy Settings for water circulation pump.
2. Press CONFIRM.
3. The economy settings for water circulation pump screen is displayed.
4. Use button F1 to switch the economy settings ON/OFF.
5. Use buttons F3 and F4 to adjust the time the water circulation pump 1 will run. (3 - 60 minutes)
Electric heater (Heating)
1. From the Auxiliary settings menu highlight Electric heater (Heating).
2. Press CONFIRM.
3. The Electric heater (Heating) screen is displayed.
4. Press F1 button to switch the function ON/OFF.
5. Use F3 and F4 buttons to adjust the time period of heat pump only operation
before the booster heater will assist in space heating. (5 -180 minutes)
GCH15010
Auxiliary settings menu screen
Economy settings for pump screen
Electric heater (Heating) screen
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