Component Checklist - Water Circuit; Backup Heater E1H, E2H, E3H - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

4. Component checklist - Water Circuit

Overview of component checklists:
Backup heater E1H, E2H, E3H.......................................................65
Booster heater E4H ........................................................................69
Thermistors .....................................................................................70
Water pump M1P (Main Supply Pump) ..........................................73
Water pump M2P (DHW pump) ......................................................75

4.1. Backup heater E1H, E2H, E3H

Technical specification
The 2-stage backup heater is composed of heater E1H (3 x 1 kW) and E2H (3 x 2
kW) or E3H (1 x 3 kW).
Location
Wiring diagram BUH*3V
Wiring diagram BUH*9V
Check procedure
Mechanical check
Not applicable
Preliminary check
1. Switch off the Daikin Altherma Monobloc CA via the user interface.
2. Switch off the Daikin Altherma Monobloc CA with the field supplied circuit breaker.
19/07/16
Daikin Altherma Monobloc CA
Plate type heat exchanger ............................................................. 77
Thermal protector backup heater Q1L ........................................... 79
Water flow sensor B1L ................................................................... 81
3-way valve M3S............................................................................ 84
Extension PCB A4P ....................................................................... 86
Switch box - BUH*3V Kit
X14M
K2M K1M
Q1L
K1R
K5M
K2R
F1B
X15M
Switch box - BUH*9V
X14M
K2M K1M
Q1L
K1R
K5M
K2R
F1B
X15M
4. Component checklist - Water Circuit
Description
The backup heater is used to assist the heat pump
system to heat the water for space heating and
domestic hot water operation.
Unit BUH*3V
Unit BUH*9V
Page 65