Panasonic WH-MXC16J9E8 Service Manual page 101

13.7.2 External Heater Control at Tank Side
Heating operation condition:
Tank set temperature +
[0°C]

Tank heater Turn On condition:
1 External Heater selected for Tank heater by remote controller.
2 Tank Heater select ON by user.
3 Tank mode operation ON (Tank mode, Heat + Tank, or Cool + Tank).
4 After TANK HEATER DELAY TIMER fulfill during heat pump startup time in tank mode, or during switching
from heating heat-up interval to tank heat + up interval in heat + tank mode.
5 Tank temperature < tank set temperature +[Remote controller Set Tank Re-heat Temp] + [-1°C].
6 20 minutes since previous heater off.
* TANK HEATER DELAY TIMER is clear when tank heat-up interval end.

Tank heater Turn Off condition:
1 Tank temperature > tank set temperature + [0°C] for continuous 15 seconds.
2 When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank heat-
up interval.
3 Tank Heater select OFF by user.
4 Tank Mode Operation OFF.
Heater OFF
Tank set temperature +
Tank Re-Heat Temp. + [ -1°C]
Heater ON
101