Thermal Protector Backup Heater Q1L - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

4.7. Thermal protector backup heater Q1L

Technical specification
The thermal protector backup heater Q1L is triggered if the temperature
exceeds 92°C. The thermal protector backup heater Q1L will cut power supply
to the backup heater to prevent the water circuit from overheating.
Location
Wiring diagram
Check procedure
Mechanical check
Visual check
1. If thermal protector backup heater Q1L has tripped, press the red button to reset thermal protector backup heater Q1L.
Functional check
1. If required, check the thermal protector backup heater Q1L trip temperature by submerging the sensor in water.
2. Heat the water and measure the temperature of the water. The thermal protector backup heater Q1L must trip at approximately
92°C.
19/07/16
Daikin Altherma Monobloc CA
Switch box - BUH kit
X14M
K2M K1M
Q1L
K1R
K5M
K2R
F1B
X15M
4. Component checklist - Water Circuit
Description
The thermal protector backup heater Q1L is a
safety component that protects the water circuit
against overtemperature.
Unit
Page 79