Install Instructions

41
Tech.Doc - 03/21 - Subject to change. © Belimo Aircontrols (USA), Inc.
ZIP Economizer
Fault Detection and Diagnostics (FDD) Table
Fault Detection Problem
Diagnostic Action
(in addition to alarm stored / transmitted)
Potential Cause
CA Fault
Code
Energy
Module is
missing
Expansion module
previously installed is not
detected
• Logic reconfigured to ignore devices attached
to Energy Module, although maintains settings
in memory
• Menu reconfigured to remove devices
• If CO2 sensor attached, lowest minimum
position is Vent Min Pos
• Functionality for pre-occupancy purge, power
exhaust, remote damper override, DCV, and low
speed fan control not available
• Module was not installed tight initially and
became loose
• Module was intentionally removed
N/A
Exhaust fan
not detected
Power exhaust fan
control circuit is not
detected
• Logic reconfigured to ignore exhaust fan
operation, although maintains settings in
memory
• EF intentionally removed, not deleted
• Exhaust fan relay coil failure
• Wire harness broken
N/A
Compressor 1
not detected
Control circuit connected
to CC1 is not detected
• 1st stage of mechanical cooling is impossible
• Integrated cooling is impossible
• Logic and FDD dependent on 1st stage is
disabled
• Compressor safety open (LP, HP, current)
• Compressor contactor coil failure
• Damage to wire increasing resistance
• Wire harness broken
N/A
Compressor 2
not detected
Control circuit connected
to CC2 is not detected
• 2nd stage of mechanical cooling is impossible
• Logic and FDD dependent on 2nd stage is
disabled
• Compressor safety open (LP, HP, current)
• Compressor contactor coil failure
• Damage to wire increasing resistance
• Wire harness broken
• Only 1 compressor in unit, wiring
inadvertently terminated at CC2, not deleted
N/A
2 Speed fan
not detected
Control circuit connected
to IF is not detected
• Logic reconfigured to high speed fan operation
only, although maintains settings in memory
• Low speed fan control circuit failure
• Wire harness broken
• Damage to wire increasing resistance
• Wire harness broken
N/A
CO2 sensor
not detected
Sensor previously installed
is not detected
• Logic reconfigured to ignore DCV configuration,
although maintains settings in memory
• Menu reconfigured to remove DCV associated
entities
• Lowest minimum position is Vent Min Pos
• CO2 sensor loses power
• Wire harness broken
• CO2 sensor electronics failure
E
CO2 sensor
out of range
Sensor is returning a value
that is not within
250...2200 ppm range
• Logic reconfigured to ignore DCV configuration,
although maintains settings in memory
• Menu reconfigured to remove DCV associated
entities
• Lowest minimum position is Vent Min Pos
• CO2 sensor out of calibration
• Wire harness broken
• CO2 sensor electronics failure
E
Heat and cool
both present
Signal present on both Y1
and W1 at the same time
• Logic dependencies requiring W1 are disabled
• Allows Y1 call to be processed
• Miswired thermostat
• Thermostat failure
• Wire harness short
• RTU is a heat pump, but “Heat Pump Op” not
set to on in settings menu
N/A
California Title 24 Fault Detection & Diagnostics Fault Categories
A. Air temperature sensor failure/fault.
B. Not economizing when it should.
C. Economizing when it should not.
D. Damper not modulating.
E. Excess outdoor air.
Refer to California Energy Commission (CEC) 2013 Building Energy Effi ciency Standard, 2013 Title 24, Part 6.