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Alarm Mode; Fan Motor; Configurable Hard Lockout - Bosch Greensource SM024 Installation, Operation And Maintenance Manual

Greensource cdi series sm model water-to-air heat pumps
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Greensource CDi Series SM Model
NOTICE: Keep the HRP configuration setting
disabled if there is no domestic water
supply available.

Alarm Mode

The HPC has a fault alarm that can be configured
(via the Bosch EasyStart app) as constant or
pulsed. Constant configuration will energize and
latch the alarm output. The pulse alarm setting will
allow the alarm relay to pulse the alarm in sync
with the status LED indicator.
The alarm, display, and status LED indicator
outputs should only pulse the latest fault. Once the
latest fault is cleared, the HPC will pulse for any
remaining faults recorded.
Refer to "Alarm Terminal Wiring" on page #61.
Also, see the "Clearing a Hard Lockout" section
below.

Fan Motor

The installer can modify the total Cubic Feet per
Minute (CFM)/Ton via the Bosch EasyStart app as
shown in the table below.
Max
Installer
CFM per
State
Ton
COOLING
450
HEATING
450
Table 4 CFM Configuration
The controller calculates the required flow rate
(CFM) based on the unit's model and size. The
controller has a cooling CFM/Ton lower limit of
270. If effective CFM is lower than this value, the
controller will override the effective CFM with the
verified CFM preventing it from being lower than
270 CFM/Ton. The cooling verified CFM will apply
to the cooling and the dehumidification modes of
the operation.
Greensource CDi Series SM Model
Min
Installer
Installer
CFM per
CFM
Ton
Step
Default
300
25
400
300
25
400
Subject to change without prior notice
The controller has a heating CFM/Ton low limit of
400 for electric heat operation. If the effective CFM
is lower than this value the controller will override
the effective CFM with the verified CFM value and
latch it to 400 CFM/Ton. The controller has a "Most
Efficient Mode" configuration. The function of this
is to enable the unit to run at the most efficiently
rated CFM values as tested in our labs.

Configurable Hard Lockout

The control can be configured from two to four
faults for a hard lockout condition (configurable
via the Bosch EasyStart app). If the control senses
the same fault for the number of times configured
within one hour from the first fault, the control will
enter a hard lockout. Example: When configured to
four strikes, if the control experiences four of the
same faults within one hour then the control will
enter a hard lockout.
Clearing a Hard Lockout
To clear a hard lockout condition, power to the (R)
terminal may be reset at the circuit breaker panel,
or the heat/cool call to the (Y1) terminal may be
reset from a connected thermostat (default). The
HPC can be configured for either reset option
using the Bosch EasyStart app.
Unit Configuration | 29
8733819578 (2019/02)

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