Checklist For Maintenance Of The Heat Reclaim Ventilation Unit; Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting - Daikin VAM350J7VEB Installer And User Reference Manual

11.3 Checklist for maintenance of the
heat reclaim ventilation unit
▪ Check the following at least once a year: Air filters.
The air filters can get blocked due to dust, dirt, leaves, etc. It is
recommended to clean the air filters yearly. A blocked air filter can
cause excessive pressure and reduced performance. See
" Maintenance of the air filter" on
▪ Check the following at least once every 2 years: Heat exchange
element.
The heat exchange element can get blocked due to dust, dirt, etc.
It is recommended to clean the heat exchange element once
every 2 years. A blocked heat exchange element can cause
excessive pressure and reduced performance. See
of the heat exchange element" on
12

Troubleshooting

12.1

Overview: Troubleshooting

This chapter describes what you have to do in case of problems.
It contains information about solving problems based on error codes.
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
12.3.1

Error codes: Overview

Malfunction code Specific code
In case of malfunction with the code on grey background, the unit still operates. However, make sure to have it inspected and repaired as soon as
possible.
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1A – 2018.05
page 43.
" Maintenance
page 44.
EEPROM failure
Locked rotor
Unstable fan rpm: failure of filter contamination check or failure of function 19(29)-0-04/-05
Power supply malfunction
Capacity setting malfunction
Fan communication error
Malfunction of fan motor sensor or fan control driver
CO sensor warning
2
Transmission error between unit and controller
Transmission error between master controller and slave controller
Wrong controller installed
Repeated central address
Transmission error between unit and central controller
External protection device activated
Indoor air thermistor (R1T) malfunction
Indoor air thermistor (R1T) out of operation range
Outdoor air thermistor (R2T) malfunction
Outdoor air thermistor (R2T) out of operation range
Functions 19(29)-0-04/-05 not possible due to low outdoor temperature
Damper-related malfunction
Damper-related malfunction+thermistor
12.2

Precautions when troubleshooting

WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
12.3 Solving problems based on error
codes
In case a malfunction code is shown on the display, consult the
dealer where the unit was purchased.
Description
12 Troubleshooting
Installer and user reference guide
41